unit 11 let’s protect the environment导学案

9年级英语（北京实验版）全册素材（含教案和练习）Unit 11 Let’s Protect the Envionment
一、教学内容
Unit 11 Let’s Protect The Environment
二、教学目标
知识目标：熟练掌握本单元课文中的单词，短语和句型。
能力目标：培养学生的综合运用知识的能力。
三、教学重点、难点
培养学生的综合运用知识的能力
四、重点知识
单词：要求大家掌握单词表里的所有单词及它们的相关词汇
短语：
1) global warming 全球变暖
2) destroy the land 毁坏土（陆）地
3) throw into streams 扔进小溪
4) be littered with 在……充满垃圾
5) pour into 涌进
6) more and more 越来越多
7) prevent heat from escaping 阻止散热
8) a certain amount of heat 一定数量的热量
9) go into outer space 释放到外太空
10) so that 以便于，目的在于
11) the surface temperature of the earth 地球表面的温度
12) have many side effects 有许多副作用
13) plant more trees 多种树
14) take in 吸收
15) be used as 作为……被使用
16) as little as possible 尽可能少
17) make use of solar energy 充分利用太阳能
18) wind power 风能
19) some new sources of energy 一些新的能源
20) start environmental groups 成立环保小组
21) the importance of protecting the earth 保护地球的重要性
22) at the same time 同时
23) the more…the more… 越……越……
句型：
1. Many people, both ( http: / / www.21cnjy.com ) in China and abroad have realized that while we are developing the world, we are also destroying the land on which we are living.
中国和其他国家的人们也都意识到，在发展世界的同时我们也在毁坏我们居住的陆地。
2. Beaches and city streets are littered with rubbish.
海滩、街道上是丢弃的垃圾。
3. The more beautiful ( http: / / www.21cnjy.com ) cars are produced, the more gases are poured into the air.
人们生产出越来越多的漂亮汽车，向大气中排放着更多的废气。
4. All of this pollut ( http: / / www.21cnjy.com )ion produces a lot of carbon dioxide which prevents heat from escaping.
所有这些污染都释放出了大量的二氧化碳，阻止了热量的释放。
5. What can we do to save our environments
我们应该做些什么来拯救我们的环境？
五、重点知识讲解
Let’s Protect The Environment
1. Global war ( http: / / www.21cnjy.com )ming is the most serious problem we face in the 21st century. Most scientists have been saying that human activity, not natural factors, is the primary cause of the warming. Many people, both in China and abroad have realized that while we are developing the world, we are also destroying the land on which we are living. We see garbage sometimes thrown into streams that supply drinking water. We find forest fires caused by careless people. Beaches and city streets are littered with rubbish.
译文：
全球变暖是我们在21世纪面临的最严重的 ( http: / / www.21cnjy.com )问题。大多数科学家认为人类活动，而不是自然因素，是引起全球变暖的主要原因。中国和其他国家的人们也都意识到，在发展世界的同时我们也在毁坏我们居住的陆地。我们看到有时垃圾被扔进提供饮用水的溪流，森林因人们的疏忽而起火。海滩、街道上是丢弃的垃圾。
1) Global warming 全球变暖
2) destroy the land 毁坏土（陆）地
3) throw into streams 扔进小溪
4) be littered with 在……充满垃圾
2. The more beaut ( http: / / www.21cnjy.com )iful cars are produced, the more gases are poured into the air. More and more tall buildings are being built, but the waste from the factories has polluted the water, and the gases from the factories have poisoned the air. All of this pollution produces a lot of carbon dioxide which prevents heat from escaping.
译文：
人们生产出越来越多的漂亮汽车，向大 ( http: / / www.21cnjy.com )气中排放着更多的废气。修建了越来越多的高楼大厦，但来自工厂的废料污染了水，来自工厂的废气污染了空气。所有这些污染都释放出了大量的二氧化碳，阻止了热量的释放。
1) pour into 涌入
2) more and more 越来越多
3) prevent heat from escaping 阻止散热
3. Light from the sun ( http: / / www.21cnjy.com )heats the earth’s atmosphere, oceans and land, making life on the earth possible. At the same time, a certain amount of heat goes into outer space so that the temperature of the earth is balanced. Nowadays less heat can escape because of the increasing levels of carbon dioxide. The surface temperature of the earth increased greatly over the last century. The warming increases with time, and could have many side effects.
译文：
太阳的射线给地球表面，海洋 ( http: / / www.21cnjy.com )和陆地提供了热量，使地球上的生命得以延伸。同时，一定数量的热量释放到外太空，这样地球的温度得以保持平衡。现在由于大气中二氧化碳的含量逐年增加，所以释放的热量也在逐年减少。在过去的一个世纪中，地球表面的温度大幅度上升。全球变暖日趋严重，同时也带来了许多副作用。
1) a certain amount of heat 一定数量的热量
2) go into outer space 释放到外太空
3) so that 以便于
4) the surface temperature of the earth 地球表面的温度
5) have many side effects 有许多副作用
6) at the same time 同时
4. The side ( http: / / www.21cnjy.com )effects of global warming are surprising. A warmer global climate melts the ice caps and raises sea levels. Furthermore, it disturbs the weather and causes floods and storms.
译文：
全球变暖的副作用令人警觉。地球气温上升使冰盖融化，海平面上升。而且，它会扰乱天气状况，并引起洪水和暴风雨。
5. What can we do t ( http: / / www.21cnjy.com )o save our environments First, we can plant more trees. Trees can take in carbon dioxide and then produce oxygen. Second, we have to find new power, coal and oil should be used as little as possible because these sources would produce a lot of gases. Instead, we should try to make use of solar energy, wind power, hydrogen and some new sources of energy. Third, we can start environmental groups to tell people the importance of protecting the earth.
译文：
我们应该做些什么来拯救我们的环境？首先 ( http: / / www.21cnjy.com )，我们可以多种树。树木可以吸收二氧化碳并产生氧气。其次，我们必须寻找新的能源。人们应该尽可能少地燃烧煤和石油。因为这些能源会向大气排放大量废气。我们应该尽量使用太阳能、风能、氢以及其他新的能源。最后，我们应该成立环保小组，以告知所有人保护地球的重要性。
知识点：
1) plant more trees 多种树
2) take in 吸收
3) be used as 作为……被使用
4) as little as possible 尽可能少
5) make use of solar energy 充分利用太阳能
6) wind power 风能
7) some new sources of energy 一些新的能源
8) start environmental groups 成立环保小组
9) the importance of protecting the earth 保护地球的重要性
【模拟试题】（答题时间：60分钟）
一、单项选择
1. I like Chinatown. It’s ________ good place to do shopping.
A. a B. an C. the D. /
*2. Kate has lost her keys. She asks _________for help.
A. I B. me C. my D. mine
**3. My home is _ ( http: / / www.21cnjy.com )_______ from our school. So I never ride my bike to school.
A. ten minute’s walk B. ten-minutes walk
C. ten minutes walk D. ten minutes’ walk
*4. Yesterday was my ( http: / / www.21cnjy.com ) friend Bruce’s birthday. He invited me ______ his birthday party.
A. for B. at C. to D. on
**5. Nearly two weeks passed _________ I received my father’s letter.
A. before B. while C. until D. as soon as
**6. We don’t have ( http: / / www.21cnjy.com ) much homework now and our school bags are _____ they used to be.
A. as heavy as B. not as heavy as C. as heavily as D. not as heavily as
**7. —Must I fi ( http: / / www.21cnjy.com )nish the work today —Yes, but you ________finish it now.
A. must B. need C. need to D. don’t have to
**8. Nancy enjoyed ( http: / / www.21cnjy.com )herself so much she visited her friends in Sydney last year.
A. that B. which C. when D. where
**9. There are so man ( http: / / www.21cnjy.com )y kinds of MP3 in the shop. We can’t decide ________.
A. what to buy B. to buy what C. which to buy D. to buy which
**10. More tha ( http: / / www.21cnjy.com )n two _______ years ago, people knew little about the universe.
A. thousands B. thousand C. thousand of D. thousands of
*11. _______interesting book it is! I want to read it again.
A. What an B. How an C. What D. How
*12. He’s fed the dog and the cat, _________
A. doesn’t he B. isn’t he C. wasn’t he D. hasn’t he
**13. Wait a minute ( http: / / www.21cnjy.com )! He will go with you as soon as he ________his work.
A. will finish B. shall finish C. finishes D. finished
**14. I _________ my homework last night when I heard a loud knock on the door.
A. did B. was doing C. have done D. had done
**15. —How often do you go to the old people’s house, Tom
—________.
A. Once a month B. In a month C. After a month D. For a month
**16. Can those ____ at the back of the classroom hear me
A. seat B. sit C. seated D. sat
17. —Would you like to join us in the game
—_____, for I have something important to attend to.
A. I will B. I’d love to C. I won’t D. I’m afraid not
**18. Working hard _________success, so your dreams can come true.
A. bring B. brings C. to bring D. bringing
**19. Mary found her bike _________ she lost a week ago.
A. who B. where C. what D. which
**20. Could you tell me ________
A. what the food is made of B. which the food is made
C. how is the food made D. who the food is made
**二、完形填空
When Josie left scho ( http: / / www.21cnjy.com )ol she had no idea what she wanted to do. A friend of hers, who was a year older, and 21 name was Josephine, was at art college, and she __22__ Josie to join her there.
Josie’s father worked ( http: / / www.21cnjy.com )in a factory, and her mother in a shop. They were __23__ their money to buy their own house, and they had __24__ that Josie would start earning too as soon as she __25__, so when she told them that she wanted to go to art college, she __26__ them to have objections(异议). But in fact they had __27__.
“You will have to find some kind of a job to __28__ your college,” Josie’s mother __29__ her. “You father and I will be very happy to keep you __30__ but we have no money for your college courses and none for paints and all the other things you’ll need.”
“Thank you very mu ( http: / / www.21cnjy.com )ch,” Josie answered. “I’m really very grateful to you both. And there’s __31__ about getting a job; the head of the art college has __32__ me one in their library.” After a few months, Josie’s parents really felt very __33__ that their daughter was going to college, especially __34__ she brought home some of the things she had painted, for which she had received high praise from her teachers.
21. A. his B. her C. whose D. that
22. A. promised B. permitted C. advised D. persuaded
23. A. spending B. counting C. saving D. sparing
24. A. hoped B. wished C. decided D. demanded
25. A. went to work B. left school C. returned home D. grew up
26. A. thought B. wished C. expected D. got
27. A. none B. nothing C. no one D. not
28. A. support B. go on C. do in D. pay for
29. A. warned B. suggested C. scolded D. admired
30. A. at work B. back C. at home D. from education
31. A. no hope B. no wonder C. one way D. no problem
32. A. given B. offered C. solved D. taken on
33. A. worried B. disappointed C. proud D. sure
34.A. if B. that C. where D. when
三、阅读理解
**A
Yesterday the polic ( http: / / www.21cnjy.com )e were joined by more than 20 volunteers in the continuing search for the two missing teenagers, Vicky Gray and Tom Hunter, and their guide, Gavin Jones. The police said that they had disappeared during an adventure (冒险) tour of Cape York Peninsula.
This was the second ( http: / / www.21cnjy.com )day of the search and the police were now very worried about the safety of the three missing people.
The police said that the search had covered a wide area, but the rainforest was thick and their work was made harder by the recent rain. Later on Chief Inspector (警官) Roger Fleet said, “The travellers had a radio with them. If they had been in trouble, they would have called us.”
The three travell ( http: / / www.21cnjy.com )ers left Cooktown very early on Saturday morning in a Toyota car. They took a small dirt road that runs down to the Daintree River, a dangerous river full of crocodiles (鳄鱼). Chief Inspector Roger Fleet said the tourists wouldn’t have got into trouble if they had stayed on the main road.
A photo of Vicky and Tom was found by a policeman under the “Be Careful about crocodiles” sign near the river. Why was the photo left behind This is just one of the unanswered questions. Other questions are: Why was the photo left behind Why was the Toyota parked and locked at the edge of the rainforest The police said that the travelers had left a map of the area behind. Why Why had someone drawn a cross on the point (地点) where the car is Is this a sign What does it mean If anyone can give information or has seen these three young people, contact the local police in Cooktown.
35. This article is probably taken from ___________.
A. a newspaper B. a magazine C. a storybook D. a guidebook
36. Which word best describes the search of the three missing people
A. Helpless B. Hard C. Delightful D. Successful
37. Which of the following things wasn’t found by the police
A. A touring map. B. A photo of the travelers.
C. The travelers’ radio. D. The travelers’ car
38. All the following are unanswered questions except_____________.
A. why they left a photo behind
B. why they came to this area
C. why their Toyota was parked in the place
D. why a cross was drawn on the map
*B
Where in the world ( http: / / www.21cnjy.com ) can you take an hour’s train ride, and pass a forest, a London street, a scene from the Wild West, and a burning building that never burns down There’s only one place, and that’s Hollywood, in California. The scenes you see from the tourist train are film sets（布景） in the Universal Studios, one of the oldest and largest movie companies(公司) in the USA.
A visit to Universa ( http: / / www.21cnjy.com )l Studios brings back memories of great days of Hollywood, the films and the stars. But they are only memories. Hollywood isn’t quite the same as it used to be. Costs have gone up and confidence has gone down. Movie-makers are afraid to spend their money on expensive new ideas. Instead, they repeat old ones.
The film industry is changing fast. Teenagers still go out to the movies. The theatre is a good place to meet friends away from home. But older people mostly stay home to watch series, like Dynasty have become as important to Hollywood as expensive movies. These “soap opera”, as they are called, show rich, powerful families living in beautiful homes and wearing beautiful clothes. But the actors and actresses are nearly all middle-aged, like many of the people who watch them.
Though it is s ( http: / / www.21cnjy.com )oap operas that are keeping the film-makers of Hollywood in Business, big films are still being made in America. But more and more of them are made outside Hollywood. New York is the most important new center, but there are many others as well. Movie-makers have realized that they don’t need Hollywood any more. Modern cameras and real houses instead of expensively made copies in a studio. Other states, especially Florida and Texas, are working hard to take the film business away from California. They are offering better working conditions and lower cost.
But Hollywood ( http: / / www.21cnjy.com ) is fighting back. The state of California is trying hard to keep its best-known industry.
39. From the passage, we know Universal Studios is ___________.
A. a very large park
B. a busy London street
C. a famous movie company
D. an old Hollywood movie
40. The movie industr ( http: / / www.21cnjy.com )y in California isn’t as successful as before because _____________.
A. young people don’t go to movie theatres any more
B. there is strong competition from other states
C. its movie companies are in need of young stars
D. the state hasn’t put a development plan into action
41. Which of the following seems to be a threat（威胁）to Hollywood？
A. The use of modern cameras and other equipment
B. The interest of middle-aged film stars
C. The making of TV series like Dynasty
D. The expensively made copies of scenes
42. What can we learn about “soap operas” from the passage
A. They are teenagers’ favorites.
B. They are much more expensive.
C. They are less attractive.
D. They are cheaper and easier to make.
C
A new study has found ( http: / / www.21cnjy.com )no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increase the risk.
Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma (黑素瘤). They said that they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma
Most health experts be ( http: / / www.21cnjy.com )lieve that by protecting the skin from the harmful effects of the sun, sunscreen helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the United States.
But questions ( http: / / www.21cnjy.com )has been raised about sunscreen and whether it may has opposite effect, perhaps by allowing people to remain exposed to the sun longer without burning.
The researchers ( http: / / www.21cnjy.com )said that among the problems with some earlier studies is that they often failed to take into account that those people most at risk for skin cancer—people with fair skin(白皙的肤色) and freckles (雀斑), for example—are more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more often.
The studies, which ge ( http: / / www.21cnjy.com )nerally relied on volunteers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study.
43. The underlined ( http: / / www.21cnjy.com )word “flaws” in the 2nd paragraph most probably means .
A. evidence B. facts C. faults D. failures
44. People with fair skin and freckles .
A. seldom use sunscreen
B. are more in danger of skin cancer
C. can be free from the harm of the sun
D. often expose themselves to the sun
45. We can learn from the passage that .
A. sunscreen users get skin cancer more often
B. the volunteers have proved the effect of sunscreen
C. the new study was based on the experiences of volunteers
D. the number of skin cancer patients is increasing in America
46. Which of the following can be the title for this passage
A. Sunscreen to Prevent Skin Cancer
B. Sunscreen to Increase Skin Cancer
C. Skin Cancer Caused by Sunscreen
D. Skin Cancer Caused by Freckles
**四、根据对话内容，用方框中所给词的适当形式填空。（其中有一词多余）
follow, bad, first, sports, easy, walk, child, kind
What’s the cooles ( http: / / www.21cnjy.com )t kind of transportation (交通工具 ) for middle school students back from the winter holidays A racing bike A car No, it’s a special 1 of shoe called Heelys (暴走鞋). Heelys look just like common 2 shoes, but they have a wheel hidden in the heel (鞋跟). So instead of 3 , kids can “fly” around in them.
“Wearing Heelys ( http: / / www.21cnjy.com )is fun and cool,” said Wu Peng, a boy who wore them on his 4 day back at No. 6 Middle School in Beijing. Wu Peng said he loves the shoes so much that he wears them wherever he goes. Sometimes he even 5 his parents’ car to the supermarket on his Heelys!
Other students thin ( http: / / www.21cnjy.com )k these are very cool, but some haven’t been so lucky with their Heelys. It’s reported that some 6 have fallen down while using these shoes, and some have been hurt.
“Heelys wheels ar ( http: / / www.21cnjy.com )e on the heels of the shoes, so it’s easy to fall,” said Liu Rui, a doctor at the Hong Kong International Medical Clinic, Beijing. Even 7 , Liu said, “Wearing Heelys for a long time could stop young people from developing their ankles (脚踝) and legs.”
五、根据中文意思完成句子：
1. 我想不会下雨，不要带伞了。
____________________________it will rain; leave your umbrella behind.
2. 我的手机坏了，没有收到你的短信。
____________________________ with my mobile phone. I can’t receive your message.
3. 她英语讲得和她姐姐一样好。
She speaks English ___________________________________.
4. 我以前抽烟，但现在不抽了。
, but I don’t these days.
5. 小汤姆直到看见妈妈进来才停止了哭喊。
Little Tom he saw his mother__________________.
【试题答案】
一、1~5 ABDCA 6~10 BDCCB 11~15 ADCBA 16~20 CDBDA
二、21~25CDCAB 26~30 CADAC 31~34 DBCD
三、A: 35. A 36. B 37. C 38. B
B: 39. C 40. B 41. A 42. D
C: 43. C 44. B 45. D 46. A
四、1. kind 2. sports ( http: / / www.21cnjy.com ) 3. walking 4. first 5. follows 6. children 7. worse
五、1. I don’t think it will rain; leave your umbrella behind.
2. There is ( http: / / www.21cnjy.com )something wrong with my mobile phone. I can’t receive your message.
3. She speaks English as well as her sister.
4. I used to smoke, but I don’t these days.
5. Little Tom did ( http: / / www.21cnjy.com )n’t stop crying until he saw his mother come/coming in.