2022-2023学年七年级上学期期末英语全真模拟卷(一)
笔试部分(75分)
一、完型填空(10分)
阅读下面短文, 从短文后所给的 A、B、C、D 四个选项中选出能填入相应空白处的最佳选项, 并在答题卡上将相应字母编号涂黑。(共 10 小题, 每小题1分)
This autumn, children and their parents in the Eixample area of Barcelona ride their bikes together to school in large groups. The program is called ‘bike bus’”. A group of five children began ____1____ to school with their parents on Fridays. Soon the group grew to about 150.
The Eixample bike bus begins around 8:25 every ____2____ morning. The road it will follow is always posted ahead of time (提前公布), so everyone knows ____3____ to join. The bike bus starts off with just a few students and ____4____, with more and more joining as it travels along.
Most kids ride their ____5____, but others ride scooters (滑板车) or use skates. The bike bus takes over the whole street. With music playing and bike bells ringing, the bike bus feels like a party.
Being able to ride with a group of kids is a big part of the ____6____. 9-year-old Maria Pitarch says, “The best part of the happiness is that we ride along and pick up my friends and we ride together.”
The Eixample bike bus goes to a few schools. When students arrive at their school, they ____7____ the bike bus and park (停车) their bikes. Some parents make the bike bus the way they ____8____ on Friday.
Parents are hoping that the ____9____ will help change ideas about how people can get around in the city. They want the city to make wider (更宽的) and more _____10_____ bike lanes (车道) that are away from cars. They point out that the program can also help cut down on pollution.
1.A.walking B.driving C.riding D.flying
2.A.Monday B.Wednesday C.Thursday D.Friday
3.A.where B.when C.how D.why
4.A.parents B.teachers C.men D.women
5.A.horses B.bikes C.motorbikes D.buses
6.A.trouble B.pollution C.fun D.worry
7.A.take B.leave C.watch D.catch
8.A.go traveling B.go to school C.go shopping D.go to work
9.A.school B.program C.city D.problem
10.A.kid-friendly B.worker-friendly C.driver-friendly D.car-friendly
二、阅读理解(40分)
第一节 阅读下列短文, 从每小题所给的 A、B、C、D 四个选项中选山最佳选项, 并在答题卡上将相应字母编号涂黑。(共 15 小题, 每小题1.5分)
A
The youngest athlete (运动员) in Chinese team, Quan Hongchan, a 14-year-old girl surprised people around the world at the Tokyo Olympics in 2021. She did so well in the women’s 10-meter platform with three perfect—10 dives (跳水) and a record-breaking total score of 466.20.
Quan Hongchan was born on March 28, 2007. She grew up in a small village of Zhanjiang. She is the third child among five children in her family. Quan started diving at the age of 7 in Zhanjiang and joined the Guangdong team after years of practice in 2018.
The reason why Quan chooses to dive is heartbreaking. Her dad is a farmer. Unluckily, her mom had a car accident four years ago. From then on, her mother often went to hospital because of her illness. Therefore, Quan wanted to win prizes in the competitions like Olympics to pay for her mother’s medical bills (账单). And she believed that the gold medal must be the best gift for her mother. Besides, she wanted to make more money for her poor family.
“I am not good at studying at school but I find confidence (信心) in diving. I just try my best to dive well,” said Quan after winning the gold medal. And she has already been practicing for the 2024 Paris Olympics.
11.What is Quan Hongchan
A.A doctor. B.An athlete. C.A farmer. D.A teacher.
12.Why does Quan Hongchan choose to dive
A.She wants to win prizes and make more money.
B.She wants to join the Guangdong team and practice.
C.Her mother wants Quan to bring her some gold medals.
D.Her father asks her to dive and join in many competitions.
13.What can we learn about Quan Hongchan
A.She can’t dive well because the platform is too high.
B.She will not attend the Olympics again in three years.
C.She joined the Guangdong team when she was 11 years old.
D.She is the youngest child among five children in her family.
14.What is the passage mainly about
A.Quan Hongchan’s difficulties in studying diving.
B.Quan Hongchan’s help with her mother’s medical bills.
C.Quan Hongchan’s success at the Olympics and her life.
D.Quan Hongchan’s life in a small village with her family.
15.In which part of a newspaper can we probably read this passage
A.Sports. B.Music. C.Nature. D.Culture.
B
The Double Ninth Festival falls on the ninth day of the ninth month on the Chinese lunar calendar (阴历) each year. As nine is the biggest number in ten, and it sounds the same as “long” in Chinese, people’s wishes for old people’s long life is the cultural meaning of the Double Ninth Festival.
Caring for old people is a traditional Chinese virtue (美德). A report made online by China Youth Daily polled (对……进行民意调查) 1, 527 Chinese under 40. It shows that more and more young people show their love for the old on this special festival.
When asked the ways they show love for the old, more than 70% of people polled said they showed love for old people by caring about their health. 69% said they spent more time with old people. 43% said they provided enough money for old people. More than 30% said they taught old people how to use smart phones better.
Yang Yiwei, a 21-year-old student said she spent the festival with her grandparents almost every year because she wanted to make them happy. However, she is studying in Hebei Province and can’t visit her grandparents this year. “But I made a video call to them by using WeChat on that day, saying “Happy Double Ninth Festival”, which made my grandparents excited and satisfied.”
16.Why is the Double Ninth Festival on the 9th day of the 9th lunar month
A.To show wishes for old people’s rich life. B.To show wishes for old people’s long life.
C.To show wishes for old people’s good luck. D.To show wishes for old people’s good health.
17.Who made the report according to Paragraph 2
A.A school. B.A student. C.A hospital. D.A newspaper.
18.What can we learn from Paragraph 3
A.Over 70% of people polled care about old people’s hobbies.
B.About 70% of people polled spend more time with old people.
C.About 40% of people polled provide the old with little money.
D.Over 30% of people polled teach the old to use computers better.
19.What does the underlined word “satisfied” in the last paragraph probably mean
A.Bored. B.Amazed. C.Pleased. D.Interested.
20.Which is the best title for the passage
A.A report on the Double Ninth Festival. B.The history of the Double Ninth Festival.
C.Some activities on the Double Ninth Festival. D.Some traditions on the Double Ninth Festival.
C
Although Shenzhen had good results after starting sorting garbage(垃圾分类)in 2020, we still need to know that the garbage is increasing(增长的)too fast. In 2020, Shenzhen made 29, 000 tons of garbage and it went up by 5, 000 tons in 2021. So people need to develop the habit of sorting garbage.
Some schools, hospitals, companies and families are good at sorting garbage. A school in Luohu District started sorting garbage six years ago. It is famous for having an “environmental protection bank” to encourage students to sort garbage. The teachers write down the recyclable(可回收的)things such as milk boxes, paper and glass the students collect every day, Then they give them points according to the recyclable things in the bank. In this way, the school helps students develop a habit of sorting garbage.
A lady in Yantian District said her family was named as a “good garbage-sorting family”. They have two garbage bins at home for kitchen waste and other waste. Besides, they set up two areas to collect useless waste and recyclables. Her family members also help others sort garbage in a right way.
Also, technologies like AI robots will be used for helping people sort garbage. In fact, garbage sorting is not really difficult. We just need time to practice it. It is very important for everyone to start sorting garbage from our own homes.
21.How many tons of garbage did Shenzhen produce in 2021
A.5, 000 tons. B.24, 000 tons. C.29, 000 tons. D.34, 000 tons.
22.What does the underlined word “they” in Paragraph 3 refer to
A.Some schools. B.The teachers. C.The students. D.Some families.
23.Why does the school in Luohu have an “environmental protection bank”
A.To tell teachers and parents to make less garbage.
B.To encourage more and more schools to sort garbage.
C.To teach people who work in banks how to sort garbage.
D.To help students develop a good habit of sorting garbage
24.What can we learn from the passage
A.Only a school in Luohu began garbage sorting in 2014.
B.Students of a school in Luohu help others sort garbage.
C.A family in Yantian does a good job on sorting garbage.
D.New technologies won’t be used to help people sort garbage.
25.What does the writer think of garbage sorting
A.It’s boring. B.It’s difficult. C.It’s important. D.It’s interesting.
第二节 短文填空
以下是一则短文,请阅读短文,并从文后的六个选项中选择五个还原到原文中,使原文的意思完整、连贯。(共5小题,每小题2分)
When you walk down the streets, you can see signs that say North, South, East and West. These are four important directions and they can help people know their ways easily. ___26___
Before the compass (指南针) was invented, people knew directions by looking at the sky. ___27___ About 2, 000 years ago, the ancient Chinese found that the lodestone (磁石) would always point to the north or the south. By the time of the Han Dynasty (汉朝), the first compass was made from this unusual kind of stone.
Chinese people always thought the south was the most important direction. ___28___ At that time, people often used the compass to know the direction of a house in China and the reason was simple. ___29___ Later on, the compass was also used for farming. In the ninth century, Chinese sailors started to use the compass to travel across the seas.
As time went by, the compass became more and more popular with people from all over the world. With its help, people will not get lost when they are traveling. ___30___
A.But how do people make the compass
B.But how do people know these directions
C.All in all, the compass makes us travel much safer than before.
D.They told directions by looking at the Sun, the Moon and the stars.
E.This was the reason (理由) why they called the compass the south pointer.
F.They believed that they could live in harmony (和谐) with nature in this way.
第三节 信息匹配
下面的材料A~F分别介绍了六个人的职业特点,请根据对Jack,Alice,Mary,Kevin和John五个人爱好或职业的描述,选出他们对应的职业特点,并将其标号填入题前括号内。(共5小题,每小题1.5分)
A.I like my job because I like to fly. I fly to different parts of China and other countries as well. I spend most of my time in the sky.
B.Taking photos is great fun for me. It can help me remember things. I also take photos for my friends and myself when I travel to a new place.
C.I enjoy my job very much, because I make people happy.Sometimes, people come to watch me. They have a lot of fun. Sometimes, they buy my CDs and play at home.
D.Every day, I am very busy. I work with children.I draw pictures and sing songs with them. I play games with them, too. I feel very happy every day.
E. My job starts early in the morning and often ends late at night. But I am doing an important job. Everyone needs to eat. They come and order different dishes, I make the dishes for them.
F. I work in the hospital and I am really busy. Every day is filled with urgent matters. I feel tired sometimes. But helping my patients make me proud of myself.
31.Jack’s hobby is cooking. He works as a cook now and he really enjoys it. ______
32.Alice likes singing best She has released(发行) a new CD recently. ______
33.Mary loves children very much. She works as a teacher in a kindergarten. ______
34.Kevin dreamt of flying when he was young, and now his dream has come true. ______
35.John is fond of taking photos. He always takes photos for his friends. ______
语法填空(10分)
阅读下面短文,在空格处填入一个适当的词或使用括号中所给词语的正确形式填空。 (共10小题,每小题1分)
Yang Hui was born in Longyan, Fujian. She ___36___ (grow) up in a small village. When she was only three, she was ___37___ (bad) burnt in a terrible fire. She lost all her ___38___ (finger) and feet. She couldn’t walk and she hardly ever went out.
The young girl had to learn to do everything. At first she wasn’t able to use chopsticks (筷子). Her parents had to teach her for ___39___ long time. She always tried her best and now she can look after ___40___ (she) well.
About five years ago, Yang Hui ___41___ (see) someone make cross-stitch (十字绣) and she liked it very much. It was very difficult ___42___ her. She failed so many times, ___43___ she never lost hope. And through hard practice, now she is better at ___44___ (make) it than many normal people.
As for her future, Yang Hui said, “I hope to stand up and walk one day. I want ___45___ (make) my dream come true.”
书面表达(15分)
46.假设你是学校环保社团的负责人,你号召全体成员参加“地球一小时”活动,保护地球。请根据以下要点提示,完成一篇保护地球的发言稿。
地球的重要性 1. 地球是我们美丽的家,有森林、河流等,也有不同的动植物; 2. 地球为我们提供了空气、水和食物。
如何保护地球 1. 参与“地球一小时”活动,熄灯一小时; 2. 停止随地丢垃圾; 3. ……(补充至少一点)
号召大家保护地球
要求:
1. 必须包含以上提示内容,可适当发挥。
2. 条理清晰、行文连贯、标点正确、书面整洁。
3. 文中不得出现真实姓名和学校。
4. 80词左右。开头已给出,不计入总词数。
参考词汇:地球一小时 Earth Hour
Dear students, It is my great honor to speak here. Today, I am going to talk about how to protect the Earth. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
参考答案:
1.C 2.D 3.A 4.A 5.B 6.C 7.B 8.D 9.B 10.A
【导语】本文介绍了被称为一个“自行车巴士”的项目:巴塞罗那Eixample地区的孩子们和他们的父母成群结队地一起骑自行车上学。
1.句意:周五,五个孩子开始和父母一起骑车上学。
walking散步;driving开车;riding骑;flying飞。根据前文“ride their bikes together to school”可知是一起骑自行车上学。故选C。
2.句意:Eixample自行车巴士在每周五早上8:25左右开始。
Monday周一;Wednesday周三;Thursday周四;Friday周五。根据后文“Some parents make the bike bus...on Friday.”可知这项活动在周五。故选D。
3.句意:它将要走的道路总是提前发布,因此每个人都知道该从哪里加入。
where哪里;when什么时候;how怎样;why为什么。根据前句“The road it will follow is always posted ahead of time”可知要走的道路总是提前发布,因此是知道从哪里加入。故选A。
4.句意:自行车巴士一开始只有几个学生和家长,随着它的行驶,越来越多的人加入。
parents父母;teachers老师;men男人;women女人。根据第一句“children and their parents”可知参加活动的是孩子和父母。故选A。
5.句意:大多数孩子骑自行车,但其他孩子骑滑板车或滑冰。
horses马;bikes自行车;motorbikes摩托车;buses公交车。根据“ride their bikes”可知主要是骑自行车。故选B。
6.句意:能够和一群孩子一起骑行是乐趣的一大组成部分。
trouble麻烦;pollution污染;fun乐趣;worry担心。根据后文“The best part of the happiness”可知幸福/快乐的最好部分。故选C。
7.句意:当学生到达学校时,他们离开自行车巴士并停放自行车。
take带走;leave离开;watch观看;catch抓住。根据前一句“When students arrive at their school”可知学生到达学校,因此要离开自行车巴士了。故选B。
8.句意:一些父母在周五上班的路上骑自行车。
go traveling去旅行;go to school去学校;go shopping去购物;go to work去工作。根据主语“Some parents”可知是父母,根据“on Friday”可知是在周五,因此是去上班。故选D。
9.句意:家长们希望这项项目能帮助人们改变在城市里的生活方式。
school学校;program项目;city城市;problem问题。根据第一段“The program is called ‘bike bus’”.”可知自行车巴士是个项目。故选B。
10.句意:他们希望这座城市建造更宽、更适合儿童的自行车道,远离汽车。
kid-friendly儿童友好型;worker-friendly工人友好型;driver-friendly驾驶员友好型;car-friendly汽车友好型。自行车巴士项目有很多孩子,因此是“儿童友好型”。故选A。
11.B 12.A 13.C 14.C 15.A
【导语】本文介绍了中国国家跳水队女运动员——全红婵。
11.细节理解题。根据第一段“The youngest athlete (运动员) in Chinese team, Quan Hongchan”可知全红婵是一位运动员。故选B。
12.细节理解题。根据倒数第二段“Therefore, Quan wanted to win prizes in the competitions like Olympics to pay for her mother’s medical bills (账单).”可知全红婵想在奥运会等比赛中获奖,以支付母亲的医疗费用。故选A。
13.推理判断题。根据第二段“Quan Hongchan was born on March 28, 2007...joined the Guangdong team after years of practice in 2018.”可知全红婵出生于2007年3月28日,2018年经过多年练习后加入广东队,是11岁。故C项正确。故选C。
14.主旨大意题。通读全文,本文介绍了中国国家跳水队女运动员——全红婵,她在奥运会上的成功和她的生活。故选C。
15.推理判断题。根据第一段“The youngest athlete (运动员) in Chinese team, Quan Hongchan”可知全红婵是一位运动员。因此在“运动”类内容上可以看到。故选A。
16.B 17.D 18.B 19.C 20.A
【导语】本文是一份关于重阳节的报告。
16.细节理解题。根据第一段“As nine is the biggest number in ten, and it sounds the same as “long” in Chinese, people’s wishes for old people’s long life is the cultural meaning of the Double Ninth Festival.”可知由于九是十个数字中最大的一个,而且它在汉语中听起来和“久”一样,人们对老人长寿的愿望是重阳节的文化含义。故选B。
17.细节理解题。根据第二段“A report made online by China Youth Daily”可知是《中国青年报》在线调查的一份报告。故选D。
18.细节理解题。根据第三段“69% said they spent more time with old people.”可知69%的人表示他们花更多时间陪伴老人。与B项同义。故选B。
19.词义猜测题。根据“excited and satisfied”可知两词意义接近,应是“兴奋的与满意的”。ABD不符合。故选C。
20.最佳标题题。根据“The Double Ninth Festival”可知本文围绕重阳节展开,是一份关于重阳节的报告。故选A。
21.D 22.B 23.D 24.C 25.C
【导语】本文讲了人们需要养成分类垃圾的习惯,详细介绍了一些垃圾分类的例子,及告诉我们垃圾分类的重要性。
21.推理判断题。根据“In 2020, Shenzhen made 29, 000 tons of garbage and it went up by 5, 000 tons in 2021.”2020年,深圳制造了29000吨垃圾,2021增加了5000吨。可知深圳在2021年产生了29000+5000=34000吨垃圾。故选D。
22.词义猜测题。根据“The teachers write down the recyclable things such as milk boxes, paper and glass the students collect every day, Then they give them points according to the recyclable things in the bank.”老师写下学生每天收集的可回收物品,如牛奶盒、纸和玻璃,然后根据银行里的可回收物给他们打分。可知“they”指的是老师。故选B。
23.细节理解题。根据“In this way, the school helps students develop a habit of sorting garbage.”通过这种方式,学校帮助学生养成分类垃圾的习惯。可知为了帮助学生养成分类垃圾的好习惯。故选D。
24.细节理解题。根据“A lady in Yantian District said her family was named as a ‘good garbage-sorting family’”盐田区一位女士表示,她的家庭被评为“垃圾分类好家庭”。可知盐田的一个家庭在垃圾分类方面做得很好。故选C。
25.细节理解题。根据“It is very important for everyone to start sorting garbage from our own homes.”对每个人来说,从自己家开始分类垃圾是非常重要的,可知它是重要的。故选C。
26.B 27.D 28.E 29.F 30.C
【导语】本文介绍了指南针的历史和发展。
26.根据前一句“These are four important directions and they can help people know their ways easily.”可知东西南北是四个重要的方向,它们可以帮助人们容易地了解自己的方向。因此下句提出疑问,B项“但人们如何知道这些方向呢?”符合题意。故选B。
27.根据前一句“Before the compass (指南针) was invented, people knew directions by looking at the sky.”可知在指南针之前人们通过看天空知道方向。因此下句指出天空的具体内容。D项“他们通过看太阳、月亮和星星来指示方向。”符合题意。故选D。
28.根据前一句“Chinese people always thought the south was the most important direction.”可知中国人一直认为南方是最重要的方向。因此E项“这就是为什么他们称指南针为南方指针。”符合题意。故选E。
29.根据前一句“At that time, people often used the compass to know the direction of a house in China and the reason was simple.”可知当时,人们经常用指南针来知道中国房子的方向,原因很简单。因此F项“他们相信他们可以以这种方式与自然和谐相处。”符合题意。故选F。
30.根据前一句“With its help, people will not get lost when they are traveling”可知有了指南针的帮助,人们在旅行时不会迷路。因此推出结论,C项“总而言之,指南针使我们旅行比以前更加安全。”符合题意。故选C。
31.E 32.C 33.D 34.A 35.B
【导语】本文是要将五个人的爱好或职业的描述和职业特点一一匹配。
31.根据“Jack’s hobby is cooking. He works as a cook now and he really enjoys it.”可知说的是烹饪,他的职业是厨师。选项E“我的工作从清晨开始,经常在深夜结束。 但我正在做一项重要的工作。 每个人都需要吃饭。 他们来点不同的菜,我为他们做菜。”与之对应。故选E。
32.根据“Alice likes singing best She has released(发行) a new CD recently.”可知,爱丽丝最喜欢唱歌。她最近发行了一张新CD。选项C“我很享受我的工作,因为我让人们开心。有时,人们会来看我。 他们有很多乐趣。 有时,他们会买我的CD并在家里播放。”与之对应。故选C。
33.根据“Mary loves children very much. She works as a teacher in a kindergarten.”可知说的是在幼儿园当老师。选项D“每天,我都很忙。 我和孩子们一起工作。我和他们一起画画和唱歌。 我也和他们一起玩游戏。 我每天都感到非常开心。”与之对应。故选D。
34.根据“Kevin dreamt of flying when he was young,and now his dream has come true.”可知凯文年轻时梦想着飞行,现在他的梦想实现了。选项A“我喜欢我的工作,因为我喜欢飞行。 我也飞往中国和其他国家的不同地区。 我大部分时间都在天空中度过。”与之对应。故选A。
35.根据“John is fond of taking photos. He always takes photos for his friends.”可知说的是拍照。选项B“拍照对我来说很有趣。 它可以帮助我记住事情。 当我去一个新的地方旅行时,我也会为我的朋友和我自己拍照。”与之对应。故选B。
36.grew 37.badly 38.fingers 39.a 40.herself 41.saw 42.for 43.but 44.making 45.to make
【导语】本文是一篇记叙文,文章主要讲述了在三岁时被大火夺去手指和脚的女孩杨慧勇敢面对生活的感人故事。
36.句意:她在一个小村庄长大。根据“Yang Hui was born in Longyan, Fujian.”可知应用一般过去时,所以应填其过去式,故填grew。
37.句意:当她仅仅三岁时,她在一次严重的火灾中被严重烧伤。此处应填副词修饰burnt,故填badly。
38.句意:她失去了她所有的手指和脚。finger“手指”,可数名词,根据‘“all her”可知应填其复数形式,故填fingers。
39.句意:她的父母不得不长时间地教她。for a long time“长时间”,符合语境,故填a。
40.句意:她总是尽她最大的努力并且现在她能很好地照顾她自己。主语she和此处所给代词为同一个人,所以应填其反身代词,故填herself。
41.句意:大约5年前,杨慧看见有人缝十字绣并且她非常喜欢它。根据“About five years ago”可知应用一般过去时,谓语动词变为其过去式,故填saw。
42.句意:对于她来说它是非常难的。for sb.“对于某人来说”,符合语境,故填for。
43.句意:她失败了许多次,但是她从未放弃希望。根据‘“She failed so many times,”和“she never lost hope”可知二者是转折关系,故填but。
44.句意:现在她比正常人更擅长于它。at“在”,介词,后接动名词,故填making。
45.句意:我想要我的梦想成真。want“想要”后续动词不定式,作其宾语,want to do sth.“想要做某事”,故填to make。
46.例文
Dear students,
It is my great honor to speak here. Today, I am going to talk about how to protect the Earth. The Earth is our beautiful home. There are forests and rivers, mountains and fields. There are many different plants and animals on Earth, too. The Earth provides us with air, water and food. Therefore, it is very important for us to protect the Earth and let me share some ways with you.
First, we can take part in Earth Hour and turn off the lights for one hour. Besides, we should stop throwing away rubbish everywhere. In addition, we can plant more trees to make the Earth a better place.
Let’s try our best to protect the Earth. I hope everyone can work together.
【详解】[总体分析]
① 题材:本文是一篇材料作文;
② 时态:时态以“一般现在时”为主;
③ 提示:写作要点已给出,考生应注意不要遗漏要点“地球的重要性、保护地球的措施、号召大家保护地球”,可适当添加细节,完善写作内容。
[写作步骤]
第一步,直接表明文章大意。直接说明文章主题是“保护地球”,借“说明地球的重要性”来引出“如何保护地球”的内容;
第二步,阐述保护地球的具体措施。从“参加地球一小时活动、不随地扔垃圾等”措施来介绍保护地球的具体做法,可适当添加相关措施的内容;
第三步,书写结尾。表达“大家一起保护地球”的号召。
[亮点词汇]
① share sth. with sb. 与某人分享某物
② take part in 参与
③ turn off 关掉
④ stop doing sth. 停止做某事
⑤ throw away 扔掉
⑥ in addition 此外
⑦ provide sb. with sth. 给某人提供某物
[高分句型]
① There are many different plants and animals on Earth, too.(There be句型)
② Therefore, it is very important for us to protect the Earth and let me share some ways with you.(“it is+形容词+for sb.+to do sth.” 句型)
③ In addition, we can plant more trees to make the Earth a better place.(动词不定式作目的状语)
④ Let’s try our best to protect the Earth.(“try one’s best+to do sth.” 句