Unit 5 Great inventions
1 Inventions are great！
单元主题：人与社会——人类发明与技术创新（了解各种类型的发明及发明家）
@激活基础
Ⅰ.任务型完形填空辨识训练
telephone， invention， machine， knowledge
1. It’s common knowledge that water boils at 100℃.
2.This washing machine works very well and saves water.
3.The amazing new invention is a really big step forward in the field of AI.
4.Watching movies is a common entertainment for us on weekends.
4.This is my telephone number. You can call me in the evening.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
5. Paper was invented （invent） by Cai Lun about 2，000 years ago.
6.Phones make us talk to friends easily （easy） even though they live far away.
7.Our lives will be changed greatly （great） by AI in the near future.
8.Lanzhou’s buses are powered （power） by electricity.
10.Dunhuang murals show great creativity （creative）.
9.He likes to collect CDs of his favourite band from different periods （period）.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.我读书的时候想到了一个主意。
An idea came to my mind when I was reading the book.
12.他们的友谊源自于对音乐的共同兴趣。
Their friendship stems from the shared interest in music.
11.我们正设法想出一些办法来解决这个问题。
We are trying to come up with some ideas to solve the problem.
12.星星点亮了漆黑的夜空。
Stars light up the dark sky.
@知能提升
Ⅳ.口语交际
阅读下面的对话，根据上下文，从方框内选择恰当的选项补全对话，使对话完整、逻辑通顺。（其中有两项为多余选项）
A.I agree with you. B.It’s so exciting！ C.How was it？ D.What kind of exhibition is it？ E.Which invention do you like best？ F.How clever our ancestors（祖先） were！ G.Do you know what the first Chinese compass looked like？
A： What did you do at the weekend？
B： I visited an exhibition in the museum.
A： 13. C
B： It was wonderful！ And it was about the great inventions in China.
A： Sounds interesting. 14. E
B： The compass. 15. G
A： Hmm， I’m not sure about it.
B： It looked like a spoon！ I think it was a useful invention. Without it， ancient people wouldn’t have been able to travel around the world successfully.
A： 16. A It played an important role in navigation（航海）.
B： Yes. 17. F I think we should learn from them.
2 Ways of travelling
@激活基础
Ⅰ.任务型完形填空辨识训练
compass， waterway， eco-friendly， spaceship
1. The Yellow River is an important waterway in Gansu.
2.You won’t get lost in the forest if you have a compass with you.
3. A spaceship launches from Jiuquan， Gansu.
4.Riding bikes is a（n） eco-friendly way to go out.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
5.The new plane is powered （power） by electric engines（引擎）.
6.We need to speed （speed） up if we want to catch the bus.
7.If you make the wheels （wheel） round， they will turn easily.
8.Humans and goods were able to travel farther （far） than ever before.
9.Boats and ships provided another important way of travelling （travel）.
10.In ancient times， farmers use wagons （wagon） to carry crops.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.事实上，这个问题太难回答了。
In fact ， this question is too difficult to answer.
12. 据说北京中轴线是北京的一个象征。
It’s said that Beijing Central Axis is a symbol of Beijing.
13.他未来想成为一名歌手。
He wants to be a singer in the future .
@知能提升
Ⅳ.完形填空
京张铁路：百年老铁路的时代新生 Hi！ I’m the Beijing-Zhangjiakou railway. Do you want to know my 14 ？
I came into being in 1909.I’m 117 years old now. The person who made me was Zhan Tianyou. He was a smart man and 15 the railway for many years. He thought China should 16 its railways with no other countries’ help. So he made me， China’s first self-built railway.
17 ， trains running on me used steam（蒸汽）. They were very slow. Their top speed was only 35 km/h. In 2020， a new high-speed railway started 18 December 30th. I was so 19 . It helped people travel much faster. The high-speed trains had a top speed of 350 km/h！ It took only 47 20 ， less than one hour to travel from Beijing to Zhangjiakou.
In the 2022 Beijing Winter Olympics， Beijing and Zhangjiakou， the two host cities， 21 lots of people from around the world. And the railway played an important part in it. I feel a little sorry because I’m not 22 to work these days. 23 I’m happy about all the changes in China. Zhan Tianyou must have the same feeling as me.
（ D ）14.A.friend B.work C.family D.story
（ C ）15.A.found B.cleaned C.studied D.made
（ B ）16.A.find B.build C.buy D.bring
（ A ）17.A.At first B.At least C.At last D.At most
（ D ）18.A.in B.during C.at D.on
（ B ）19.A.bored B.excited C.tired D.surprised
（ A ）20.A.minutes B.hours C.days D.seconds
（ C ）21.A.saved B.gave C.welcomed D.heard
（ D ）22.A.short enough B.tall enough
C.old enough D.young enough
（ C ）23.A.Because B.So C.But D.And
Ⅴ.阅读理解
一张图看懂埃德蒙顿的出行选择 How do you travel in the city？ Do you have a car in your family？ People in Edmonton made a survey on ways of transportation and reasons for using cars in the city. Here are the results. The pie chart explains what ways of transportation people prefer to use most of the time and the bar chart shows the reasons why people in Edmonton use their cars in the city.
All in all， people in Edmonton make good use of different ways of transportation but there is a heavy dependence on cars for work. What’s the situation in your city？
阅读以上材料，回答下列各小题。
（ D ）24.Why do people make the survey in Edmonton？
A.To see how many people travel by car and by bus.
B.To see why people travel by car and by bus.
C.To see how people go to work and how many people travel by car.
D.To see how people travel in the city and why they travel by car.
（ A ）25.Which is the most popular way of transportation in Edmonton？
A.The car. B.The bike.
C.The subway. D.The bus.
（ D ）26.What percent of the people in Edmonton use cars for shopping？
A.51％. B.20％. C.10％. D.3％.
（ D ）27.According to these two charts， which one is right？
A.More than one quarter of the people in Edmonton use the cars for free time activities.
B.Five percent of the people travel by car for shopping as well as for free time activities.
C.People in Edmonton prefer to take the bus rather than take the subway.
D.Cars used to take children to school are fewer than those for business purposes.
（ A ）27.From the passage， we can know that .
A.people are more likely to go to work by car
B.people in Edmonton can’t put different ways of transportation to good use
C.there are only three main ways of transportation in Edmonton
D.people never use cars for business in Edmonton
3 Computers and the internet
@激活基础
Ⅰ.任务型完形填空辨识训练
tool， dictionary， spell， application， convenient
1.You can use a dictionary to look up new words.
2.My sister likes online shopping very much because it’s very convenient .
3.The teacher asks us to spell ten words every day.
4.The application of AI makes our daily life easier.
5. DeepSeek is such a useful tool for working and studying.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.Computers are now widely （wide） used to search for information.
7.You can simply （simple） solve this maths problem by following the steps.
8.The teacher gave the definition （define） of the word in class.
9.The letter was written （write） by my brother yesterday afternoon.
10.I like these printed （print） cards for my friends.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.一条新公路将村庄与城市连接起来。
The village is connected to the city by a new highway.
12.现在，我随时都可以上网查资料。
Nowadays， I can go online to search for information whenever.
13.如果你同意我的观点，请对我点头。
If you agree with me， please nod at me.
Ⅲ.语法与情景对话
（ B ）11.The old building in 1950 and it has a history of over 70 years.
A.built B.was built C.is built D.will be built
（ C ）15.The Winter Olympic Games in Beijing in 2022.It was a great success.
A.hold B.held
C.were held D.are held
（ B ）16.The book in the playground just now. Do you know whose it is？
A.found B.was found
C.finds D.is found
（ D ）12.When the cars ？
A.is； invented B.are； invented
C.was； invented D.were； invented
（ D ）13.The playground with snow this morning.
A.covers B.covered
C.is covered D.was covered
@知能提升
Ⅳ.阅读理解
超萌机器鱼！海洋微塑料的“清道夫” Chinese scientists made a new kind of robot. It looks like a small fish and can swim in the water. But this fish is not a real fish—it is a machine！
People can use it to help clean the oceans by collecting tiny pieces of plastic（塑料） called microplastics. These microplastics are smaller than 5mm. They come from plastic bags， bottles and clothes. They can get to even the deepest parts of the sea. Fish and other sea animals often eat them by mistake. This is very harmful to sea animals’ health and even makes them die.
Now， the robotic fish can swim around and collect the microplastics. It moves like a real fish， so . The robot is about 1.5cm long and it is not heavy at all. Scientists say one fish can collect about 5 grams of plastic a day. If we use many of them， they can help make the ocean cleaner.
This small robotic fish is not just a tool for cleaning—it’s a symbol of how science can help solve big environmental（环境） problems.
阅读以上材料，回答下列各小题。
（ C ）14.What can people use robotic fish to do？
A.To play with real fish.
B.To swim faster than other fish.
C.To help clean the ocean.
D.To teach students how to swim.
（ A ）15.What does the underlined word “harmful” in Paragraph 2 mean？
A.Bad. B.Different.
C.Important. D.Useless.
（ B ）16. Which of the following can be put in “ ” in Paragraph 3？
A.it can swim very fast
B.it doesn’t scare other animals
C.it looks like a big shark
D.it can talk to sea animals
（ D ）22.What can we learn from the last paragraph？
A.The robotic fish is dangerous.
B.Students like solving environmental problems.
C.All schools have robotic fish now.
D.The robot may help us learn about sea life.
（ B ）17. Which one is the best title for the passage？
A.The Danger of Microplastics
B.Robotic Fish： A New Helper to Clean the Ocean
C.A Real Fish Can Eat Plastic
D.How Scientists Learn About Life Under the Sea
Ⅴ.任务型阅读理解
阅读下面材料，并按要求完成第18至22小题。
从地面到空中，飞行汽车的新探索 Have you ever thought about taking a flying car in the future？ It will become true soon！ Companies are trying to make the flying car one of real transportation. In cities， people get tired of being stuck in（被困住） a traffic jam， so they’ve dreamed about flying machines for many years.
People in Dubai are very lucky， because they can travel in the self-flying air taxi very soon. The egg-shaped air taxi， named the Ehang184， is made in China. It can travel for up to 30 minutes with a person that weighs up to 100kg. It can reach a top speed of 160 kilometres per hour.
To call for a flying taxi， people need to enter their destinations into a mobile app. The flying taxi then sets the flight plan and takes the people to their destinations.
Dubai isn’t the first city to show an interest in using the flying car. New York City is also testing the flying car， Transition， for public use. Transition is a two-seat air plane that runs on gas. It can not only fly in the sky but also run on the . Its wings will close when running on the road and open up for flying. Sounds cool， right？
18.How does the writer start the passage？
He starts the passage by asking a question .
19.Why have people in cities dreamed about flying machines for many years？
Because they felt tired of being stuck in a traffic jam/a traffic jam .
20.What shape is Ehang184？
The Ehang184 is in the shape of a（n） egg .
21.What word can you put in the “ ”？
I can put “ road/street/land/… ” there.
22.Which English word means “目的地” in the passage？
It is “ destinations/destination ”.
4 Thank you， Mr Pasteur！
@激活基础
Ⅰ.任务型完形填空辨识训练
pour， process， raw， dairy， germ
1.This fish is raw ， so we can’t eat it now.
2.Don’t pour cold water into the milk.
3.Wash your hands to keep germs away.
4.I like to eat dairy products for breakfast.
5. Don’t be afraid of making mistakes because it is a process of language learning.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.My brother’s dream is to be a scientist （science）.
7.This kind of rare plant was discovered （discover） in the mountain.
8.Please heat （heat） the milk before you drink it.
9.Doctors are great and they save many lives （life） every day.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.我们需要穿过森林才能到达那个村庄。
We need to go through the forest to reach the village.
11.如果你睡眠不好，可能会很容易生病。
If you don’t sleep well， you may get sick easily.
12.昨天我们为爷爷的生日举杯庆祝。
We made a toast to our grandpa’s birthday yesterday.
13.由于下大雪，许多学生上学迟到了。
Many students were late for school because of the heavy snow.
14.雨林是数百万种动植物的家园。
Rainforests are home to millions of plants and animals.
@知能提升
Ⅳ.完形填空
DVI机器人：生病孩子的校园好帮手
Nowadays， science and technology are changing our lives. There is a small robot that may help sick children in the 15 or at home. Through the robot， these children 16 hear and see their teachers and friends. And they can also join in class activities 17 they can’t go to school.
The robot is called DVI. DVI goes to school for a sick child. And the child’s classmates must help to put the robot 18 the child’s desk in class. The child is 19 to control（控制） the robot with a phone at home. He can 20 problems and play games with his classmates. So the robot becomes the eyes， the mouth and the 21 of the child at home.
DVI is cool and looks like a human. One of the designers said， “We spent lots of time 22 the shape of the robot. It is necessary to build a close 23 between children and DVI. This is very 24 because the robot should be a friend to children. Children might not like to carry a cold machine.”
We hope the robot can bring happiness to more sick children.
（ B ）15.A.theatre B.hospital C.school D.factory
（ C ）16.A.should B.must C.can D.need
（ D ）17.A.until B.after C.because D.although
（ B ）18.A.in B.on C.under D.to
（ A ）19.A.able B.ready C.afraid D.similar
（ C ）20.A.create B.send C.discuss D.guess
（ D ）21.A.legs B.face C.nose D.ears
（ B ）22.A.taking up B.thinking about
C.finding out D.looking for
（ D ）23.A.culture B.hobby C.promise D.relationship
（ A ）24.A.important B.priceless C.impossible D.unlucky
Ⅴ.阅读理解
从车轮到登月，发明改写人类生活 There have been many great inventions that changed the way we live. The first great invention was the wheel， which made it easier to carry heavy things and travel long distances.
For hundreds of years after that， few inventions had such a big influence. Then in the early 1800s， the world started to change quickly. In the second half of the 19th century， many great inventions appeared， including the camera， the light bulb and the radio. These became a big part of our life.
The early 20th century saw more great inventions： the helicopter in 1909， movies with sound in 1926， the computer in 1928， and jet planes in 1930.Nylon was also invented in 1935， changing the clothes people wear.
By this time， people had a better life and wanted to explore again. They began looking for ways to go into space. Russia made the first step， then the US. In 1969， Americans first walked on the moon. This is just a beginning—new inventions will help us do things we can’t even dream of now.
阅读以上材料，回答下列各小题。
（ B ）25.What was the first great invention according to the passage？
A.The camera.
B.The wheel.
C.The light bulb.
D.The computer.
（ C ）26.When was the computer invented？
A.In 1909. B.In 1926.
C.In 1928. D.In 1935.
（ A ）27.Which invention changed the clothes people wear？
A.Nylon. B.The radio.
C.Jet planes. D.The helicopter.
5 Refrigerator timeline
@激活基础
Ⅰ.任务型完形填空辨识训练
energy， add， refrigerator， preserve， production
1.The factory’s production is growing fast this year.
2.Don’t add too much salt to the soup.
3.Solar energy is a clean and renewable resource.
4.We should try to preserve the old buildings in our city.
5.Please put the fresh fruit and milk in the refrigerator .
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.I nearly froze （freeze） when I went out without a coat.
7.Bamboo was used to make （make） baskets in the old days.
8.This new smartphone is smaller （small） and lighter than the old one.
9.Everyone became （become） excited when they heard the good news.
10.There is too much sand in the air. We can’t see anything clearly （clear）.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.在21世纪，太阳能开始普及。
In the 21st century， solar energy became popular .
12.我通常在购物前列一张清单。
I usually make a list before going shopping.
13.在古代，我们的祖先用星星辨别方向。
Our ancestors used stars to find directions in ancient times.
@知能提升
Ⅳ.阅读理解
中国新四大发明：改变生活的黑科技 Do you know China’s “four great new inventions”？ Let’s have a look at them together.
China has built the world’s largest high-speed railway network. The train can run at the speed of 250-kilometres/h.
It’s China’s leading mobile and online payment service. Since 2004，buyers have been able to use their smartphones to pay by scanning payment codes on the phone.
With around 1 billion Internet users，China has been the world’s largest and fast-growing e-commerce market. People buy what they want online without going outside.
Nowadays， in China， shared bikes allow users to pick up or park a bike almost everywhere. To unlock a shared bike， you need to scan the QR code（二维码） on it. After finishing riding， you can lock the bike and pay for your ride through mobile payment.
阅读以上材料，判读下列句子正误。正确填A、错误填B。
（ B ）14.China’s high-speed trains can run 250 kilometres per hour at most.
（ A ）15.Online payment service has a history of about twenty years.
（ A ）16.China has the largest number of Internet users in the world.
（ B ）17.Shared bikes allow users to go almost everywhere for free.
（ A ）18.All these inventions have one thing in common： they make our life convenient.
Ⅴ.任务型完形填空
用方框中所给单词的适当形式填空，使短文通顺、正确、连贯，每个单词限用一次。
牙刷的历史：古代中国人的智慧结晶
because， what， brush， thank， invention， without， sound， appeared， its， earliest
There is a small thing we use every day. We usually put it in the bathroom. 19. Without it， we might have tooth problems. Can you guess 20. what it is？ Yes， it’s the toothbrush. But do you know anything about its history？
According to some research， before toothbrushes 21. appeared ， the ancient Chinese people cleaned their teeth with some small tree branches. About 800 years ago， people made a kind of brush with pig hair and bamboo. It might be the world’s 22. earliest form of toothbrushes. As time went by， the forms of toothbrushes changed. For example， people chose horse-tail hair instead of pig hair 23. because pig hair was too hard. Imagine that you travel back to ancient times and 24. brush your teeth uncomfortably. It 25. sounds fantastic， doesn’t it？
Around the 15th century， the Chinese toothbrush found 26. its way into Europe. It became popular among local people soon. The 27. invention of toothbrushes was not well-known， but it was very useful in daily life. Today we have a good habit of brushing teeth. We should 28. thank the ancient Chinese for it.
Understanding cultures Great inventions of ancient China
@激活基础
Ⅰ.任务型完形填空辨识训练
emperor， merchant， worldwide， porcelain， origin
1. China is famous for its fine porcelain around the world.
2.The merchant sells beautiful silk in the local market.
3. It seems that shaking hands is a（n）
worldwide way to greet someone for the first time.
4. The origin of paper-making dates from ancient China.
5.The wise emperor cared about the lives of his people very much.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6. Compasses （compass） were very important for sailors in ancient times.
7.Grandma told us a fascinating （fascinate） story about her childhood last night.
8.The Silk Road was named （name） after this valuable product.
9.She accidentally （accidental） met her primary school teacher in the park.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.奥运会的历史可以追溯到数千年前。
The history of the Olympic Games can be traced back to thousands of years ago.
11.毫无疑问，茶叶在全世界都受欢迎。
Without doubt， tea is popular all over the world .
12.奶酪是由牛奶制成的，对人们的健康有益。
Cheeseis made from milk， and it’s good for people’s health.
13.这种水果富含维生素。
This kind of fruit is rich in vitamins.
@知能提升
Ⅲ.口语交际
阅读下面的对话，根据上下文，从方框内选择恰当的选项补全对话，使对话完整、逻辑通顺。（其中有两项为多余选项）
A.Who invented it？ B.What are you doing？ C.What are you reading？ D.It would save a lot of time every morning. E.He wanted to keep something cold. F.Which invention do you use every day？ G.It’s convenient to communicate with each other on it.
A： Hey，Bob！ 10. C
B： A book about great inventions. Did you know the fridge was invented in 1876？
A： Wow， I thought it was older. 11. A
B： A German engineer named Carl von Linde. 12. E
A： Funny！ I can’t imagine life without it. What about the telephone？
B： That was Alexander Graham Bell in 1876.He was only 29.
A： I see. 13. F
B： My phone. It can be used as a telephone， camera and computer.
A： True！ If you could invent something， what would it be？
B： A small robot that finds lost socks. 14. D
A： Great idea！ Let’s start drawing the design now.
单元语法聚焦 Grammar
@语法精讲
一般过去时的被动语态
1.构成
一般过去时的被动语态由“助动词was/were＋及物动词的过去分词构成”。
2.句式结构
句式 结构 例句
肯定句 主语＋was/were＋及物动词的过去分词＋其他. A new school was built in our town last year.去年我们镇上建了一所新学校。
否定句 主语＋was/were＋not＋及物动词的过去分词＋其他. The problem wasn’t solved by him yesterday.这个问题昨天没被他解决。
句式 结构 例句
一般 疑问句 Was/Were＋主语＋及物动词的过去分词＋其他？ Were you invited to the party last night？你昨晚被邀请参加派对了吗？
特殊 疑问句 对主语提问： 疑问词＋was/were＋及物动词的过去分词＋其他？ Who was invited to the party by Mary？谁被玛丽邀请去派对了？
对非主语提问： 疑问词＋was/were＋主语＋及物动词的过去分词＋其他？ When was the computer invented？电脑是什么时候被发明的？
3.时间标志词
表示过去的时间词： yesterday（昨天）， the day before yesterday（前天）， last week/month/year（上周/上个月/去年）， ago（以前）， in＋过去年份（如in 2025）， the other day（前几天）等。
@语法精练
（中考考点变式练）
Ⅰ.语法与情景对话
（ D ）1.（2025江西） —I hear that Jingdezhen Porcelain（瓷器） in Paris last month.
—Wow！ Good news.
A.shows B.has shown
C.is shown D.was shown
（ B ）2.（2025福建改编） China’s Beijing Library “Public Library of the Year” in 2024.
A.named B.was named
C.will be named D.is named
（ B ）3.（2025乐山改编） When Tony why he was late for school， he just kept silent.
A.asks B.was asked
C.will be asked D.is asked
（ A ）4.（2025哈尔滨改编） —Do you know that tea， one of the most popular drinks in the world， by accident？
—Really？ It’s my favourite drink.
A.was invented B.invented
C.was inventing D.is invented
（ D ）5.（2025天水一模） Robot dogs to perform yangge dance at the 2025 Spring Festival Gala.
A.use B.used
C.are used D.were used
（ C ）6.（2025定西模拟预测） The room just a moment ago， You can enter in a while.
A.cleaned B.was cleaning
C.was cleaned D.has cleaned
（ B ）7.（2025张掖三模） What a nice bridge！ When it ？
A.did； build B.was； built
C.will； build D.was； building
（ B ）8.（2025陇南二模） These gifts by children during their last summer holiday.
A.made B.were made
C.make D.are made
Ⅱ.按要求完成句子，每空一词
9.The local people built this bridge many years ago. （改为被动语态）
This bridge was built by local people many years ago.
10.The students planted the trees five years ago. （改为被动语态）
The trees were planted by the students five years ago.
11.Where did you take these photos？（改为被动语态）
Where were these photos taken ？
12.I was allowed to play football. （改为否定句）
I wasn’t allowed to play football.
13.The machine was invented many years ago. （对画线部分提问）
When was the machine invented？
14.Ann was allowed to watch TV for an hour on weekends. （对画线部分提问）
What was Ann allowed to do on weekends？
单元主题写作 Writing
@写作话题剖析
本单元以“发明”为话题，要求学生能用所学的词汇和句型写一篇与发明相关的书面表达。常以记叙文、说明文或应用文呈现。
@写作素材积累
【短语】
1. light up 照亮
2. come up with 提出
3. in fact 实际上
4. be widely used 被广泛使用
5. be invented by… 被……发明
【句型】
6. Which invention do you think is the most important？你认为哪项发明最重要？
7.Computers and the Internet have changed our lives . 计算机和互联网改变了我们的生活。
8.Mobile phones are one of the most useful inventions.手机是最有用的发明之一。
9.On the other hand， we ought to use them for learning， such as finding study materials. 另一方面，我们应该用它们来学习，比如查找学习资料。
@学以致用
发明改变世界。请你根据表格，以“The Most Useful Invention”为题，写一篇短文介绍手机的发明时间、人物、手机的至少三个用途，并至少谈两点作为青少年的你们应如何合理地使用手机，使它成为最有用的发明之一。
The Most Useful Invention
Invention Mobile Phone
Inventor American， Martin Cooper
Time 1973
Usage （用途） 1.communicate with others 2.taking photos 3.go shopping， listen to music…
How to use them well 1.be allowed to use mobile phones 2.use them in the right way…
要点：1.需包含以上提示信息，可适当发挥，语句通顺，意思连贯；
2.文中不得出现真实的人名、校名和地名；
3.词数：80词左右（开头已给出，但不计入总词数） 。
思路提示：
介绍手机的发明时间与发明者（They were invented…）→分条介绍手机的用途（Firstly…Secondly…Thirdly…）→谈论如何正确使用手机（As teenagers…On one hand…On the other hand…）
The Most Useful Invention
Mobile phones are one of the most useful inventions. They were invented in 1973 by an American named Martin Cooper. Mobile Phones bring us great convenience. Firstly， they help us communicate with others at any time. Secondly， we can take photos to record happy moments. Thirdly， they make life easier， like shopping online or listening to music.
As teenagers， we should use phones responsibly. On one hand， we must control time and avoid using them too long. On the other hand， we ought to use them for learning， such as finding study materials. This way， phones remain truly useful.Unit 5 Great inventions
1 Inventions are great！
单元主题：人与社会——人类发明与技术创新（了解各种类型的发明及发明家）
@激活基础
Ⅰ.任务型完形填空辨识训练
telephone， invention， machine， knowledge
1. It’s common that water boils at 100℃.
2.This washing works very well and saves water.
3.The amazing new is a really big step forward in the field of AI.
4.Watching movies is a common for us on weekends.
4.This is my number. You can call me in the evening.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
5. Paper was （invent） by Cai Lun about 2，000 years ago.
6.Phones make us talk to friends （easy） even though they live far away.
7.Our lives will be changed （great） by AI in the near future.
8.Lanzhou’s buses are （power） by electricity.
10.Dunhuang murals show great （creative）.
9.He likes to collect CDs of his favourite band from different （period）.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.我读书的时候想到了一个主意。
An idea my mind when I was reading the book.
12.他们的友谊源自于对音乐的共同兴趣。
Their friendship the shared interest in music.
11.我们正设法想出一些办法来解决这个问题。
We are trying to some ideas to solve the problem.
12.星星点亮了漆黑的夜空。
Stars the dark sky.
@知能提升
Ⅳ.口语交际
阅读下面的对话，根据上下文，从方框内选择恰当的选项补全对话，使对话完整、逻辑通顺。（其中有两项为多余选项）
A.I agree with you. B.It’s so exciting！ C.How was it？ D.What kind of exhibition is it？ E.Which invention do you like best？ F.How clever our ancestors（祖先） were！ G.Do you know what the first Chinese compass looked like？
A： What did you do at the weekend？
B： I visited an exhibition in the museum.
A： 13.
B： It was wonderful！ And it was about the great inventions in China.
A： Sounds interesting. 14.
B： The compass. 15.
A： Hmm， I’m not sure about it.
B： It looked like a spoon！ I think it was a useful invention. Without it， ancient people wouldn’t have been able to travel around the world successfully.
A： 16. It played an important role in navigation（航海）.
B： Yes. 17. I think we should learn from them.
2 Ways of travelling
@激活基础
Ⅰ.任务型完形填空辨识训练
compass， waterway， eco-friendly， spaceship
1. The Yellow River is an important in Gansu.
2.You won’t get lost in the forest if you have a with you.
3. A launches from Jiuquan， Gansu.
4.Riding bikes is a（n） way to go out.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
5.The new plane is （power） by electric engines（引擎）.
6.We need （speed） up if we want to catch the bus.
7.If you make the （wheel） round， they will turn easily.
8.Humans and goods were able to travel （far） than ever before.
9.Boats and ships provided another important way of （travel）.
10.In ancient times， farmers use （wagon） to carry crops.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.事实上，这个问题太难回答了。
， this question is too difficult to answer.
12. 据说北京中轴线是北京的一个象征。
It’s said that Beijing Central Axis is Beijing.
13.他未来想成为一名歌手。
He wants to be a singer .
@知能提升
Ⅳ.完形填空
京张铁路：百年老铁路的时代新生 Hi！ I’m the Beijing-Zhangjiakou railway. Do you want to know my 14 ？
I came into being in 1909.I’m 117 years old now. The person who made me was Zhan Tianyou. He was a smart man and 15 the railway for many years. He thought China should 16 its railways with no other countries’ help. So he made me， China’s first self-built railway.
17 ， trains running on me used steam（蒸汽）. They were very slow. Their top speed was only 35 km/h. In 2020， a new high-speed railway started 18 December 30th. I was so 19 . It helped people travel much faster. The high-speed trains had a top speed of 350 km/h！ It took only 47 20 ， less than one hour to travel from Beijing to Zhangjiakou.
In the 2022 Beijing Winter Olympics， Beijing and Zhangjiakou， the two host cities， 21 lots of people from around the world. And the railway played an important part in it. I feel a little sorry because I’m not 22 to work these days. 23 I’m happy about all the changes in China. Zhan Tianyou must have the same feeling as me.
( )14.A.friend B.work C.family D.story
( )15.A.found B.cleaned C.studied D.made
( )16.A.find B.build C.buy D.bring
( )17.A.At first B.At least C.At last D.At most
( )18.A.in B.during C.at D.on
( )19.A.bored B.excited C.tired D.surprised
( )20.A.minutes B.hours C.days D.seconds
( )21.A.saved B.gave C.welcomed D.heard
( )22.A.short enough B.tall enough
C.old enough D.young enough
( )23.A.Because B.So C.But D.And
Ⅴ.阅读理解
一张图看懂埃德蒙顿的出行选择 How do you travel in the city？ Do you have a car in your family？ People in Edmonton made a survey on ways of transportation and reasons for using cars in the city. Here are the results. The pie chart explains what ways of transportation people prefer to use most of the time and the bar chart shows the reasons why people in Edmonton use their cars in the city.
All in all， people in Edmonton make good use of different ways of transportation but there is a heavy dependence on cars for work. What’s the situation in your city？
阅读以上材料，回答下列各小题。
( )24.Why do people make the survey in Edmonton？
A.To see how many people travel by car and by bus.
B.To see why people travel by car and by bus.
C.To see how people go to work and how many people travel by car.
D.To see how people travel in the city and why they travel by car.
( )25.Which is the most popular way of transportation in Edmonton？
A.The car. B.The bike.
C.The subway. D.The bus.
( )26.What percent of the people in Edmonton use cars for shopping？
A.51％. B.20％. C.10％. D.3％.
( )27.According to these two charts， which one is right？
A.More than one quarter of the people in Edmonton use the cars for free time activities.
B.Five percent of the people travel by car for shopping as well as for free time activities.
C.People in Edmonton prefer to take the bus rather than take the subway.
D.Cars used to take children to school are fewer than those for business purposes.
( )27.From the passage， we can know that .
A.people are more likely to go to work by car
B.people in Edmonton can’t put different ways of transportation to good use
C.there are only three main ways of transportation in Edmonton
D.people never use cars for business in Edmonton
3 Computers and the internet
@激活基础
Ⅰ.任务型完形填空辨识训练
tool， dictionary， spell， application， convenient
1.You can use a to look up new words.
2.My sister likes online shopping very much because it’s very .
3.The teacher asks us to ten words every day.
4.The of AI makes our daily life easier.
5. DeepSeek is such a useful for working and studying.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.Computers are now （wide） used to search for information.
7.You can （simple） solve this maths problem by following the steps.
8.The teacher gave the （define） of the word in class.
9.The letter was （write） by my brother yesterday afternoon.
10.I like these （print） cards for my friends.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.一条新公路将村庄与城市连接起来。
The village is the city by a new highway.
12.现在，我随时都可以上网查资料。
Nowadays， I can go online to information whenever.
13.如果你同意我的观点，请对我点头。
If you me， please nod at me.
Ⅲ.语法与情景对话
( )11.The old building in 1950 and it has a history of over 70 years.
A.built B.was built C.is built D.will be built
( )15.The Winter Olympic Games in Beijing in 2022.It was a great success.
A.hold B.held
C.were held D.are held
( )16.The book in the playground just now. Do you know whose it is？
A.found B.was found
C.finds D.is found
( )12.When the cars ？
A.is； invented B.are； invented
C.was； invented D.were； invented
( )13.The playground with snow this morning.
A.covers B.covered
C.is covered D.was covered
@知能提升
Ⅳ.阅读理解
超萌机器鱼！海洋微塑料的“清道夫” Chinese scientists made a new kind of robot. It looks like a small fish and can swim in the water. But this fish is not a real fish—it is a machine！
People can use it to help clean the oceans by collecting tiny pieces of plastic（塑料） called microplastics. These microplastics are smaller than 5mm. They come from plastic bags， bottles and clothes. They can get to even the deepest parts of the sea. Fish and other sea animals often eat them by mistake. This is very harmful to sea animals’ health and even makes them die.
Now， the robotic fish can swim around and collect the microplastics. It moves like a real fish， so . The robot is about 1.5cm long and it is not heavy at all. Scientists say one fish can collect about 5 grams of plastic a day. If we use many of them， they can help make the ocean cleaner.
This small robotic fish is not just a tool for cleaning—it’s a symbol of how science can help solve big environmental（环境） problems.
阅读以上材料，回答下列各小题。
( )14.What can people use robotic fish to do？
A.To play with real fish.
B.To swim faster than other fish.
C.To help clean the ocean.
D.To teach students how to swim.
( )15.What does the underlined word “harmful” in Paragraph 2 mean？
A.Bad. B.Different.
C.Important. D.Useless.
( )16. Which of the following can be put in “ ” in Paragraph 3？
A.it can swim very fast
B.it doesn’t scare other animals
C.it looks like a big shark
D.it can talk to sea animals
( )22.What can we learn from the last paragraph？
A.The robotic fish is dangerous.
B.Students like solving environmental problems.
C.All schools have robotic fish now.
D.The robot may help us learn about sea life.
( )17. Which one is the best title for the passage？
A.The Danger of Microplastics
B.Robotic Fish： A New Helper to Clean the Ocean
C.A Real Fish Can Eat Plastic
D.How Scientists Learn About Life Under the Sea
Ⅴ.任务型阅读理解
阅读下面材料，并按要求完成第18至22小题。
从地面到空中，飞行汽车的新探索 Have you ever thought about taking a flying car in the future？ It will become true soon！ Companies are trying to make the flying car one of real transportation. In cities， people get tired of being stuck in（被困住） a traffic jam， so they’ve dreamed about flying machines for many years.
People in Dubai are very lucky， because they can travel in the self-flying air taxi very soon. The egg-shaped air taxi， named the Ehang184， is made in China. It can travel for up to 30 minutes with a person that weighs up to 100kg. It can reach a top speed of 160 kilometres per hour.
To call for a flying taxi， people need to enter their destinations into a mobile app. The flying taxi then sets the flight plan and takes the people to their destinations.
Dubai isn’t the first city to show an interest in using the flying car. New York City is also testing the flying car， Transition， for public use. Transition is a two-seat air plane that runs on gas. It can not only fly in the sky but also run on the . Its wings will close when running on the road and open up for flying. Sounds cool， right？
18.How does the writer start the passage？
He starts the passage by .
19.Why have people in cities dreamed about flying machines for many years？
Because they felt tired of .
20.What shape is Ehang184？
The Ehang184 is in the shape of a（n） .
21.What word can you put in the “ ”？
I can put “ ” there.
22.Which English word means “目的地” in the passage？
It is “ ”.
4 Thank you， Mr Pasteur！
@激活基础
Ⅰ.任务型完形填空辨识训练
pour， process， raw， dairy， germ
1.This fish is ， so we can’t eat it now.
2.Don’t cold water into the milk.
3.Wash your hands to keep away.
4.I like to eat products for breakfast.
5. Don’t be afraid of making mistakes because it is a of language learning.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.My brother’s dream is to be a （science）.
7.This kind of rare plant was （discover） in the mountain.
8.Please （heat） the milk before you drink it.
9.Doctors are great and they save many （life） every day.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.我们需要穿过森林才能到达那个村庄。
We need to the forest to reach the village.
11.如果你睡眠不好，可能会很容易生病。
If you don’t sleep well， you may easily.
12.昨天我们为爷爷的生日举杯庆祝。
We made our grandpa’s birthday yesterday.
13.由于下大雪，许多学生上学迟到了。
Many students were late for school the heavy snow.
14.雨林是数百万种动植物的家园。
Rainforests are home to plants and animals.
@知能提升
Ⅳ.完形填空
DVI机器人：生病孩子的校园好帮手
Nowadays， science and technology are changing our lives. There is a small robot that may help sick children in the 15 or at home. Through the robot， these children 16 hear and see their teachers and friends. And they can also join in class activities 17 they can’t go to school.
The robot is called DVI. DVI goes to school for a sick child. And the child’s classmates must help to put the robot 18 the child’s desk in class. The child is 19 to control（控制） the robot with a phone at home. He can 20 problems and play games with his classmates. So the robot becomes the eyes， the mouth and the 21 of the child at home.
DVI is cool and looks like a human. One of the designers said， “We spent lots of time 22 the shape of the robot. It is necessary to build a close 23 between children and DVI. This is very 24 because the robot should be a friend to children. Children might not like to carry a cold machine.”
We hope the robot can bring happiness to more sick children.
( )15.A.theatre B.hospital C.school D.factory
( )16.A.should B.must C.can D.need
( )17.A.until B.after C.because D.although
( )18.A.in B.on C.under D.to
( )19.A.able B.ready C.afraid D.similar
( )20.A.create B.send C.discuss D.guess
( )21.A.legs B.face C.nose D.ears
( )22.A.taking up B.thinking about
C.finding out D.looking for
( )23.A.culture B.hobby C.promise D.relationship
( )24.A.important B.priceless C.impossible D.unlucky
Ⅴ.阅读理解
从车轮到登月，发明改写人类生活 There have been many great inventions that changed the way we live. The first great invention was the wheel， which made it easier to carry heavy things and travel long distances.
For hundreds of years after that， few inventions had such a big influence. Then in the early 1800s， the world started to change quickly. In the second half of the 19th century， many great inventions appeared， including the camera， the light bulb and the radio. These became a big part of our life.
The early 20th century saw more great inventions： the helicopter in 1909， movies with sound in 1926， the computer in 1928， and jet planes in 1930.Nylon was also invented in 1935， changing the clothes people wear.
By this time， people had a better life and wanted to explore again. They began looking for ways to go into space. Russia made the first step， then the US. In 1969， Americans first walked on the moon. This is just a beginning—new inventions will help us do things we can’t even dream of now.
阅读以上材料，回答下列各小题。
( )25.What was the first great invention according to the passage？
A.The camera.
B.The wheel.
C.The light bulb.
D.The computer.
( )26.When was the computer invented？
A.In 1909. B.In 1926.
C.In 1928. D.In 1935.
( )27.Which invention changed the clothes people wear？
A.Nylon. B.The radio.
C.Jet planes. D.The helicopter.
5 Refrigerator timeline
@激活基础
Ⅰ.任务型完形填空辨识训练
energy， add， refrigerator， preserve， production
1.The factory’s is growing fast this year.
2.Don’t too much salt to the soup.
3.Solar is a clean and renewable resource.
4.We should try to the old buildings in our city.
5.Please put the fresh fruit and milk in the .
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6.I nearly （freeze） when I went out without a coat.
7.Bamboo was used （make） baskets in the old days.
8.This new smartphone is （small） and lighter than the old one.
9.Everyone （become） excited when they heard the good news.
10.There is too much sand in the air. We can’t see anything （clear）.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
11.在21世纪，太阳能开始普及。
In the 21st century， solar energy .
12.我通常在购物前列一张清单。
I usually before going shopping.
13.在古代，我们的祖先用星星辨别方向。
Our ancestors stars find directions in ancient times.
@知能提升
Ⅳ.阅读理解
中国新四大发明：改变生活的黑科技 Do you know China’s “four great new inventions”？ Let’s have a look at them together.
China has built the world’s largest high-speed railway network. The train can run at the speed of 250-kilometres/h.
It’s China’s leading mobile and online payment service. Since 2004，buyers have been able to use their smartphones to pay by scanning payment codes on the phone.
With around 1 billion Internet users，China has been the world’s largest and fast-growing e-commerce market. People buy what they want online without going outside.
Nowadays， in China， shared bikes allow users to pick up or park a bike almost everywhere. To unlock a shared bike， you need to scan the QR code（二维码） on it. After finishing riding， you can lock the bike and pay for your ride through mobile payment.
阅读以上材料，判读下列句子正误。正确填A、错误填B。
( )14.China’s high-speed trains can run 250 kilometres per hour at most.
( )15.Online payment service has a history of about twenty years.
( )16.China has the largest number of Internet users in the world.
( )17.Shared bikes allow users to go almost everywhere for free.
( )18.All these inventions have one thing in common： they make our life convenient.
Ⅴ.任务型完形填空
用方框中所给单词的适当形式填空，使短文通顺、正确、连贯，每个单词限用一次。
牙刷的历史：古代中国人的智慧结晶
because， what， brush， thank， invention， without， sound， appeared， its， earliest
There is a small thing we use every day. We usually put it in the bathroom. 19. it， we might have tooth problems. Can you guess 20. it is？ Yes， it’s the toothbrush. But do you know anything about its history？
According to some research， before toothbrushes 21. ， the ancient Chinese people cleaned their teeth with some small tree branches. About 800 years ago， people made a kind of brush with pig hair and bamboo. It might be the world’s 22. form of toothbrushes. As time went by， the forms of toothbrushes changed. For example， people chose horse-tail hair instead of pig hair 23. pig hair was too hard. Imagine that you travel back to ancient times and 24. your teeth uncomfortably. It 25. fantastic， doesn’t it？
Around the 15th century， the Chinese toothbrush found 26. way into Europe. It became popular among local people soon. The 27. of toothbrushes was not well-known， but it was very useful in daily life. Today we have a good habit of brushing teeth. We should 28. the ancient Chinese for it.
Understanding cultures Great inventions of ancient China
@激活基础
Ⅰ.任务型完形填空辨识训练
emperor， merchant， worldwide， porcelain， origin
1. China is famous for its fine around the world.
2.The sells beautiful silk in the local market.
3. It seems that shaking hands is a（n）
way to greet someone for the first time.
4. The of paper-making dates from ancient China.
5.The wise cared about the lives of his people very much.
Ⅱ.根据句意，用括号内所给单词的适当形式填空
6. （compass） were very important for sailors in ancient times.
7.Grandma told us a （fascinate） story about her childhood last night.
8.The Silk Road was （name） after this valuable product.
9.She （accidental） met her primary school teacher in the park.
Ⅲ.根据所给汉语提示完成下列句子（每空一词）
10.奥运会的历史可以追溯到数千年前。
The history of the Olympic Games can be to thousands of years ago.
11.毫无疑问，茶叶在全世界都受欢迎。
Without doubt， tea is popular .
12.奶酪是由牛奶制成的，对人们的健康有益。
Cheeseis milk， and it’s good for people’s health.
13.这种水果富含维生素。
This kind of fruit vitamins.
@知能提升
Ⅲ.口语交际
阅读下面的对话，根据上下文，从方框内选择恰当的选项补全对话，使对话完整、逻辑通顺。（其中有两项为多余选项）
A.Who invented it？ B.What are you doing？ C.What are you reading？ D.It would save a lot of time every morning. E.He wanted to keep something cold. F.Which invention do you use every day？ G.It’s convenient to communicate with each other on it.
A： Hey，Bob！ 10.
B： A book about great inventions. Did you know the fridge was invented in 1876？
A： Wow， I thought it was older. 11.
B： A German engineer named Carl von Linde. 12.
A： Funny！ I can’t imagine life without it. What about the telephone？
B： That was Alexander Graham Bell in 1876.He was only 29.
A： I see. 13.
B： My phone. It can be used as a telephone， camera and computer.
A： True！ If you could invent something， what would it be？
B： A small robot that finds lost socks. 14.
A： Great idea！ Let’s start drawing the design now.
单元语法聚焦 Grammar
@语法精讲
一般过去时的被动语态
1.构成
一般过去时的被动语态由“助动词was/were＋及物动词的过去分词构成”。
2.句式结构
句式 结构 例句
肯定句 主语＋was/were＋及物动词的过去分词＋其他. A new school was built in our town last year.去年我们镇上建了一所新学校。
否定句 主语＋was/were＋not＋及物动词的过去分词＋其他. The problem wasn’t solved by him yesterday.这个问题昨天没被他解决。
句式 结构 例句
一般 疑问句 Was/Were＋主语＋及物动词的过去分词＋其他？ Were you invited to the party last night？你昨晚被邀请参加派对了吗？
特殊 疑问句 对主语提问： 疑问词＋was/were＋及物动词的过去分词＋其他？ Who was invited to the party by Mary？谁被玛丽邀请去派对了？
对非主语提问： 疑问词＋was/were＋主语＋及物动词的过去分词＋其他？ When was the computer invented？电脑是什么时候被发明的？
3.时间标志词
表示过去的时间词： yesterday（昨天）， the day before yesterday（前天）， last week/month/year（上周/上个月/去年）， ago（以前）， in＋过去年份（如in 2025）， the other day（前几天）等。
@语法精练
（中考考点变式练）
Ⅰ.语法与情景对话
( )1.（2025江西） —I hear that Jingdezhen Porcelain（瓷器） in Paris last month.
—Wow！ Good news.
A.shows B.has shown
C.is shown D.was shown
( )2.（2025福建改编） China’s Beijing Library “Public Library of the Year” in 2024.
A.named B.was named
C.will be named D.is named
( )3.（2025乐山改编） When Tony why he was late for school， he just kept silent.
A.asks B.was asked
C.will be asked D.is asked
( )4.（2025哈尔滨改编） —Do you know that tea， one of the most popular drinks in the world， by accident？
—Really？ It’s my favourite drink.
A.was invented B.invented
C.was inventing D.is invented
( )5.（2025天水一模） Robot dogs to perform yangge dance at the 2025 Spring Festival Gala.
A.use B.used
C.are used D.were used
( )6.（2025定西模拟预测） The room just a moment ago， You can enter in a while.
A.cleaned B.was cleaning
C.was cleaned D.has cleaned
( )7.（2025张掖三模） What a nice bridge！ When it ？
A.did； build B.was； built
C.will； build D.was； building
( )8.（2025陇南二模） These gifts by children during their last summer holiday.
A.made B.were made
C.make D.are made
Ⅱ.按要求完成句子，每空一词
9.The local people built this bridge many years ago. （改为被动语态）
This bridge by local people many years ago.
10.The students planted the trees five years ago. （改为被动语态）
The trees by the students five years ago.
11.Where did you take these photos？（改为被动语态）
Where these photos ？
12.I was allowed to play football. （改为否定句）
I to play football.
13.The machine was invented many years ago. （对画线部分提问）
the machine invented？
14.Ann was allowed to watch TV for an hour on weekends. （对画线部分提问）
was Ann allowed to on weekends？
单元主题写作 Writing
@写作话题剖析
本单元以“发明”为话题，要求学生能用所学的词汇和句型写一篇与发明相关的书面表达。常以记叙文、说明文或应用文呈现。
@写作素材积累
【短语】
1. 照亮
2. 提出
3. 实际上
4. 被广泛使用
5. 被……发明
【句型】
6. do you think is the most important？你认为哪项发明最重要？
7.Computers and the Internet have . 计算机和互联网改变了我们的生活。
8.Mobile phones are one of inventions.手机是最有用的发明之一。
9.On the other hand， we ought to use them for learning， finding study materials. 另一方面，我们应该用它们来学习，比如查找学习资料。
@学以致用
发明改变世界。请你根据表格，以“The Most Useful Invention”为题，写一篇短文介绍手机的发明时间、人物、手机的至少三个用途，并至少谈两点作为青少年的你们应如何合理地使用手机，使它成为最有用的发明之一。
The Most Useful Invention
Invention Mobile Phone
Inventor American， Martin Cooper
Time 1973
Usage （用途） 1.communicate with others 2.taking photos 3.go shopping， listen to music…
How to use them well 1.be allowed to use mobile phones 2.use them in the right way…
要点：1.需包含以上提示信息，可适当发挥，语句通顺，意思连贯；
2.文中不得出现真实的人名、校名和地名；
3.词数：80词左右（开头已给出，但不计入总词数） 。
思路提示：
介绍手机的发明时间与发明者（They were invented…）→分条介绍手机的用途（Firstly…Secondly…Thirdly…）→谈论如何正确使用手机（As teenagers…On one hand…On the other hand…）
The Most Useful Invention
Mobile phones are one of the most useful inventions.
