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Unit 4 Natural disasters
必考短语和句型短语：
1.natural disaster 自然灾害
2.think of 想起，想到
3.be interested in ... 对......感兴趣
4.be worried about 担心
5.dream about 梦见，梦到
6.such as 例如
7.pass by 通过；经过
8.stick with 持续，坚持
9.worry about 担心
10.think about 考虑
11.stare at 盯着看，凝视
12.in surprise 惊讶地
13.for now 暂时
14.so...that... 如此......以至于......
15.wait for 等候
16.pack up 收拾行李
17.for example 例如
18.write down写下
19.survival kit 救生包
20.in the end最后
21.from...to... 例如
22.how far 多远
23.pay attention to 注意，留心
24.fall down倒塌
25.at once 立刻
26.as...as possible 尽可能......地
27.wake up 醒来
28.in case of 假如
29.stay away from... 远离......
30.sit around 无所事事地消磨时间；闲坐
31.fall on deaf ears 不被理睬，不被注意
短语用法：
1.start to do sth. 开始做某事
2.have to do sth. 必须/不得不做某事
3.try to do sth. 试图/尽力做某事
4.it is/was adj. to do sth. 做某事是......的
5.afford to do sth. 负担得起做某事
6.have no time to do sth. 没有时间做某事
7.it seems that +从句 似乎......
8.want to do sth. 想要做某事
9.stop doing sth. 停止做某事
10.ask sb. to do sth. 让某人做某事
11.be able to do sth. 能够做某事
12.suggest doing sth. 建议做某事
13.It takes (sb.) some time to do sth.（某人）花费多少时间做某事
14.make +宾语+形容词 使某人/某物......
15.find sb.+doing sth. 发现某人正在做某事
16.let sb. do sth. 让某人做某事
17.adj./adv. enough to do sth 足够......可以做某事
18.had better do sth. 最好做某事
19.help sb. (to) do sth. 帮助某人做某事
20.expect sb. to do sth. 期待某人做某事
21.keep doing sth. 一直做某事
【经典句型】
1.It’s important to stick with it.坚持工作很重要。
2.I have no time to think about the flood.我没有时间考虑洪水。
3.It took a long time to build the house.建这座房子花了很长时间。
4.It seems that nobody is paying any attention to the flood.似乎没有人关注那场洪水。
5.It is not a good idea to sit around and worry about the flood.闲坐着担心洪水不是一个好主意。
必考语法：
it 作形式主语的用法
代词it可以用来代替一个名词、一个短语、一个句子，在句中作主语或宾语。本单元学习it作形式主语的几种情况。
1. it作主语指时间、日期、天气、距离和气温等。
It’s nine o’clock now. （指时间）
It is much colder than it was yesterday. （指天气）
It is about 5 kilometres from here to my home. （指距离）
It is very hot in the classroom. （指气温）
It is Sunday today. （指日期）
2. It作形式主语代替动词不定式，常用于以下句型中：
(1) it is/was adj. (of/for) sb. to do sth.当表语是与事物的特征有关的形容词时，如easy, difficult, hard, important,necessary等，用介词for.It is difficult for Lucy to learn physics.It is interesting for us to play badminton.当表语是描述人的性格、品质的形容词时，如kind, nice, polite, clever, foolish, stupid等，用介词of.It is kind of you to help me.It is clever of the little child to work out such a difficult math problem.
(2) it takes/took sb. some time to do sth.It takes him an hour to do his homework every day.
(3) it is/was n. to do sth.It is great fun to have a party here.It was a great pleasure to work with you.
3.it作形式主语还常用于句型 “it seems/appears that +从句”，表示 “似乎/好像/看来......”It seems that he knows everything.It appears that we are wrong.
提升训练
一、单项选择
1．Don’t ________ such a hurry. It isn’t time _________ the exam papers yet.
A．be in; to give out B．in; for giving out C．in; to give out D．/; to give out
2．Since we didn’t receive your call, we even didn’t know if your car _________ on the way.
A．was broken B．broke down C．was broken down D．is broken down
3．— I’m very sorry, Dad. I lost my tennis match.
— ________! You did your best.
A．You’re welcome B．Sounds good C．Never mind D．That’s for sure
4．— I am afraid that I can’t do well in the running race. I might let my classmates down.
— . You don’t need to push yourself too hard.
A．What a pity B．Take it easy
C．It’s a pleasure D．Take your time
5．— How fast Nantong is developing!
— Exactly. It’s such a ________ city that everyone enjoys life here.
A．living B．alive C．lively D．live
6．Even though we are having great difficulty dealing with the problem, we still need to keep our hope ________.
A．lovely B．weak C．awake D．alive
7．—He often replies to his daughter’s message after he receives it.
—There’s nothing strange about that. She is the person he cares most about.
A．immediately B．slowly C．quietly D．suddenly
8．Mr. Black walked around and offered help ________we were doing an experiment.
A．while B．before C．after D．until
9．—Have you told Dr. Greenall our latest achievement in the vaccine research
—Not yet. When I ________, he ________ a speech, so we had no time for a few words.
A．arrives; will give B．arrived; was giving
C．arrives; is giving D．arrived; has given
10．—________ did the bell ring
—We were having dinner ________ the bell rang.
A．When; when B．When; while C．While; while D．While; when
二、短文填空
阅读短文，在横线上填上一个恰当的单词或者用括号中所给单词的适当形式填空。
A hurricane (飓风) is a huge storm that forms over warm ocean water. Hurricanes have winds that move in a circle. Hurricane winds are very powerful (强大的) and can move at speeds from 120 km/h 11 over 300 km/h.
The centre of hurricane winds 12 (call) the eye. Winds in the eye are not very strong. Around the eye is an area called the eye wall, the wall is where winds are 13 (strong) and rain is the heaviest.
Strong winds and heavy rain can 14 (do) a lot of damage (破坏) when a hurricane moves overland.
Hurricane winds can be strong enough 15 (break) windows into pieces. The winds can even knock over tall 16 (tree), which might fall on buildings or cars. Strong winds can pick up objects and send 17 (they) into the air, with causing damage.
Heavy rain from a hurricane can cause floods in areas that are not close to a coast. The floodwater can be very deep. It sometimes 18 (reach) almost up to the top of houses. Water goes into the houses 19 (quick) and does a lot of damage. Wooden structures (结构) might not be safe after a flood.
20 there is no way to stop a hurricane, you can get prepared for it.
三、选词填空
阅读短文，从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。每空限填一词，每词限用一次。
it, that, but, from, care, weak, complete, call, like, build
Strange things happen when you drive into Green Bank, West Virginia. Radio stations become far 21 than in other places. Your mobile phone becomes useless. If you want to make a 22 , you can use the phone booth (电话亭) at the edge of the town.
Going to Green Bank is 23 travelling back in time. There is no mobile phone service and no Wi-Fi. Welcome to the Quiet Zone.
There is a reason for the silence in Green Bank.You’ll see it as you drive into the area. It’s a radio telescope 24 towers 71485 feet above the town. It was 25 in the 1950s. The government created the National Radio Quiet Zone to protect it.
The radio telescope is one of the largest moving things on Earth. Scientists use 26 to search for radio waves 27 stars and planets. One of its main jobs is to listen for life somewhere in the universe. Kids in Green Bank aren’t 28 cut off from the world. Home computers are connected to the Internet, 29 the speed is slow. A video can take several minutes to load. For most people, that’s just fine. Green Bank is in the beautiful mountains of West Virginia. Kids can spend time 30 for pets or farm animals.
四、补全对话
根据对话内容，选择适当的选项补全对话。（有两项是多余的）
W: Hi, Bob. What did you do last weekend
M: Hi. Amy. 31 It drew the world’s attention on March 20th, 2021. Chinese archaeologists (考古学家) announced that they had found more than 500 cultural relics (文物) in six pits (坑), which go back over 3200 years. The relics include bronze-ware (青铜制品), gold and bronze masks (面具) and ivory (铁).
W: 32
M: Covering 12 square kilometers, Sanxingdui, which was first discovered accidentally (偶然地) by local farmers in 1929, is located in Guanghan, about 60 kilometers from Chengdu. It’s believed to be the symbol of the ancient Shu Kingdom. The kingdom was a center of civilization (文明) along the Yangtze River.
W: I think the new discoveries will help to better understand many unexplained findings of Sanxingdui culture.
M: 33 . The new discoveries are similar to those found in 1986, as they also included bronze masks and metal trees.
W: 34
M: For sacrifice (祭祀). They also raise an important question about the beginning of Chinese civilization. The ancient Shu civilition of Sanxingdui is regarded to be one of the earliest examples of Chinese civilization.
W: 35
M: Yes. These new discoveries Sanxingdui had a close connection with Liangzhu Culture in Zhejiang province which has a history of 4, 300 years to 300 years.
W: That’s very long. There are still many unknown areas in the ancient Chinese history and we have a long way to know our colorful culture.
A．What were they used for
B．Yes, it’s good to know ancient China.
C．I went to Sanxingdui.
D．What can you learn from the text
E．Wow, so amazing! Anything more about it
F．Is it one of the birthplaces of Chinese civilization
G．The Sanxingdui Ruins (遗址) were discovered in 1929 by a farmer digging in his field.
五、完形填空
The forest plays an important role on the earth. Trees make up the forest and 36 oxygen. As we all know, we can’t live 37 oxygen. Trees are the source of creations to survive (生存) on the earth. The forest 38 animals a comfortable and warm home. It can not only provide us oxygen but also keep us from being polluted.
But a lot of people can’t realize (意识到) the 39 of forest. They cut as many trees as they can for more money for their own. 40 we go on cutting down them, the wild animals will lose their homes and the weather will become 41 . Our environment will get worse and worse.
It’s time for us to do 42 to save forests for our beautiful life. Please protect our homes from now on. Let’s take 43 . We should stop cutting too many trees and stop using wooden things, 44 wooden chopsticks. At the same time, we should plant more trees and produce a beautiful forest home. Only 45 this way can we live a comfortable life in the future.
36．A．discover B．produce C．destroy
37．A．besides B．with C．without
38．A．offers B．builds C．develops
39．A．price B．number C．importance
40．A．Although B．If C．So
41．A．weak B．quiet C．terrible
42．A．something B．anything C．nothing
43．A．chances B．advice C．action
44．A．according to B．such as C．as long as
45．A．by B．at C．in
六、阅读理解
Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin (旋转). When the windmills spin, they make electricity. Then we can use the electricity. A lot of people think that wind power is new, but that’s not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity.
Wind power is a very popular source of energy. Most people think that we should use it more and more. First of all, it’s clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. Also, wind power is cheap, and it’s getting even cheaper.
A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. They used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds.
However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for people, because windmills are often in very pretty areas. Also, wind doesn’t blow all the time, so we can’t use wind power all the time. Finally, windmills are noisy.
Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.
46．Why DON’T new windmills kill birds Because________.
A．birds don’t fly near them B．they spin slowly
C．they are shorter than old windmills D．new windmills don’t spin
47．When did people start using wind power
A．About 25 years ago. B．About 80 years ago.
C．About 500 years ago D．Over 1,000 years ago.
48．What does the article say about wind power
A．Most people don’t like it. B．It’s getting cheaper
C．Denmark doesn’t use it. D．It’s often in cities.
49．What is the best title for the passage
A．Expensive Windmills B．Cheap and clean Energy
C．Popular and Clean Wind Power D．Dangerous for Birds
50．Which statement is NOT true
A．Wind power is an environmentally friendly energy.
B．Not many people understand wind power very well.
C．Wind produces 25 percent of the world’s electricity.
D．Birds may get killed by old windmills.
From November 1st to December 10th in 2020, China started its seventh national population census(普查). 7 million census takers have asked each family about their name, gender(性别), age, education, job and so on. This census is different from the ones in the past. For the first time, citizens were encouraged to use smartphones and other digital tools to record their information.
China has a national population census every 10 years. The first one was done in 1953. At that time, there were about 600 million people in China. But China’s population has boomed. It was about 1.37 billion in 2010.
For the 2020’s national population census, all people of China were included in the census. But Chinese citizens who had settled(定居) abroad and foreigners who were staying in China on either business or tourist visas(旅游签证) were not counted.
“The census is very important for every citizen,” said Ning Jizhe. “It will help improve infrastructure(基础建设) and public services. For example, if census results show that there are many children living in an area, the government will know that it should build more schools there.”
Scientists can also learn more about population growth from the census. In some years, the population grows faster than in others. Even in the same year, population growth is different in different places. Scientists can use the information to find out what causes growth in certain years and places.
51．Why was the 2020’s national population census different from others
A．China had the larger population in 2020 than in other years.
B．The 2020’s national population census included people’s jobs and education.
C．People could use digital tools to record their information in 2020.
D．The 2020’s national population census took the shortest time.
52．The first national population census in China was done ________.
A．in 1953 B．in 1964 C．in 2000 D．in 2010
53．What does the underlined word “boomed” in Paragraph 2 probably mean in Chinese
A．下降 B．包括 C．测量 D．增长
54．________ was included in the 2020’s national population census.
A．Chinese people who are traveling abroad
B．Chinese people who have settled in other countries
C．Foreigners staying in China with business visas
D．Foreigners staying in China for holidays
55．Why is the national population census important
A．Scientists can compare(比较) the population of China with the population of the world
B．The government will build more schools.
C．It is helpful to improve infrastructure and public services.
D．The population in China grows faster than in other countries.
参考答案：
1．A
【详解】句意：别这么着急。现在还不是发考卷的时候。
考查祈使句的否定形式以及非谓语动词。be in a hurry“匆忙”，第一句是祈使句的否定形式，don’t后接动词原形。第二空作time的定语，应用动词不定式，故选A。
2．B
【详解】句意：因为我们没有收到你的电话，我们甚至不知道你的车是否在路上出了故障。
考查动词短语。根据“your car...on the way”可知此处指车辆出故障，用动词短语break down，break down没有被动语态。故选B。
3．C
【详解】句意：——父亲，我很抱歉。我输了网球比赛。——没有关系！你做得非常棒。
考查情景交际。You’re welcome不用谢；Sounds good听起来很棒；Never mind没有关系；That’s for sure那当然。根据题干“I lost my tennis match.”可知，说话人输了网球比赛；结合答语中“You did your best.”可知，父亲正在宽慰输掉比赛的孩子，因此Never mind符合题意。故选C。
4．B
【详解】句意：——恐怕我在赛跑中表现不好。我可能会让我的同学失望。——放轻松。你不需要太强迫自己。
考查情景交际。What a pity真可惜；Take it easy放轻松；It’s a pleasure不用客气；Take your time别着急。根据“You don’t need to push yourself too hard.”可知此处应该是安慰对方，放轻松，别太紧张。故选B。
5．C
【详解】句意：——南通发展得多快啊！——没错。这是一个充满活力的城市，每个人都喜欢这里的生活。
考查形容词辨析。living活着的，强调说明“尚在人间”，“健在”；alive多用于人，与dead相对，指“还活着的”，着重于状态；lively活泼的，充满活力的；live“活着的”，通常指物，不指人，常用来作定语放名词的前面，还指“实况转播的”；空处修饰名词city，指的是“充满活力的城市”，故选C。
6．D
【详解】句意：尽管我们在处理这个问题上有很大的困难，但我们仍然需要保持我们的希望。
考查形容词辨析。lovely可爱的；weak虚弱的；awake醒着的；alive活着的。根据“keep our hope…”可知，表示让希望永存，alive修饰物可表示“继续存在的”。故选D。
7．A
【详解】句意：——他收到女儿的信息之后往往会立刻回复。——对于那个没什么可奇怪的。她是他最关心的人。
考查副词的辨析。immediately“立即”；slowly“慢慢地”；quietly“安静地”；suddenly“突然地”。根据“She is the person he cares most about.”可知，女儿是他最关心的人，推测他收到女儿的信息应该会立即回复。故选A。
8．A
【详解】句意：当我们在做实验时，布莱克先生走来走去，主动提供帮助。
考查连词辨析。while当……时；before在……之前；after在……之后；until直到。根据“offered help …we were doing an experiment”可知，是在做实验时提供帮助，故选A。
9．B
【详解】句意：——你告诉格林博士我们疫苗研究的最新成果了吗？——还没有。当我到达时，他正在演讲，所以我们没有时间说几句话。
考查时态。第一处根据“so we had no time for a few words”可知，动作发生在过去，用一般过去时，排除AC；第二处强调在过去的某个时间点正在发生的动作，应过去进行时。故选B。
10．A
【详解】句意：——铃什么时候响的？——铃响的时候我们正在吃晚饭。
考查特殊疑问句和连词辨析。when表示“何时”，用于提问时间；表示“当……的时候”，引导时间状语从句，从句中的动词可以用延续性动词，也可以用终止性动词；while当……的时候，引导时间状语从句，从句中的动词常用延续性动词或表示状态的动词。分析句子可知，第一个句子是特殊疑问句，对时间进行提问，空格处需用疑问词when；后一句根据题干“we were having dinner…the bell rang”，可知当铃响的时候“我们”正在吃晚饭，空格后引导短暂性动词，用when引导时间状语从句，故选A。
11．to 12．is called 13．the strongest 14．do 15．to break 16．trees 17．them 18．reaches 19．quickly 20．Although/Though
【导语】本文是一篇说明文，向我们介绍飓风的相关内容。
11．句意：飓风的风力非常强大，风速可以从每小时120公里到每小时300多公里。根据“from 120 km/h...over 300 km/h.”可知，此处考查短语from...to...“从……到……”，固定短语。故填to。
12．句意：飓风的中心称为飓风眼。“The centre of hurricane winds”和“call”之间是被动关系，时态是一般现在时，所以用一般现在时的被动语态，主语属于第三人称单数形式，所以be动词用is，call变成called，故填is called。
13．句意：眼睛周围是一个叫做眼壁的区域，眼壁是风最强、雨最多的地方。根据“rain is the heaviest”可知，and连接并列成分，所以空处也用strong的最高级作表语，the和最高级连用，故填the strongest。
14．句意：当飓风经过陆地时，强风和暴雨会造成很大的破坏。情态动词can后跟动词原形，故填do。
15．句意：飓风的威力足以把窗户吹成碎片。be+adj.+enough to do sth.“足够……能做某事”，不定式作结果状语，故填to break。
16．句意：风甚至可以吹倒高大的树木，它们可能会倒在建筑物或汽车上。根据“which might fall on buildings or cars”可知，此处的名词应用复数形式表泛指，故填trees。
17．句意：强风能卷起物体并把它们吹到空中，造成破坏。send是动词，所以填they的宾格形式作宾语。故填them。
18．句意：它有时几乎到达了屋顶。reach“到达”，时态是一般现在时，it作主语，谓语动词用三单形式，故填reaches。
19．句意：水很快进入房，造成了很大的破坏。空处修饰动词短语“goes into”，所以应用副词，quick的副词形式是quickly。故填quickly。
20．句意：虽然没有办法阻止飓风，但你可以为它做好准备。“there is no way to stop a hurricane”和“you can get prepared for it.”两句之间是让步关系，所以用although/though引导让步状语从句。故填Although/Though。
21．weaker 22．call 23．like 24．that 25．built 26．it 27．from 28．completely 29．but 30．caring
【导语】本文主要介绍了Green Bank与众不同的地方——没辐射，网络很慢……，孩子们可以花时间照顾宠物或农场动物。
21．句意：无线电台变得比其他地方弱得多。根据“Your mobile phone becomes useless”可知，无线电台变得弱了，手机变得无用了，根据far以及than可知，此空应填weak的比较级weaker，故填weaker。
22．句意：如果你想打电话，你可以用城边的电话亭。根据“you can use the phone booth”可知，想打电话可以用电话亭，make a call“打电话”，故填call。
23．句意：去Green Bank就像时光倒流。根据“Going to Green Bank is … travelling back in time.”及备选词可知，就像时光倒流，like“像”，介词，故填like。
24．句意：这是一座高出小镇71485英尺的射电望远镜。分析句子结构可知，此处是一个定语从句，先行词a radio telescope指物，用that引导定语从句，故填that。
25．句意：它建于20世纪50年代。故填built。根据“It was … in the 1950s”及备选词可知，此处介绍建立的时间，build“建立”，was与过去分词构成一般过去时被动语态，故填built。
26．句意：科学家们用它来搜索来自恒星和行星的无线电波。此空指代前文提到的radio telescope，单数形式用it指代，故填it。
27．句意：科学家们用它来搜索来自恒星和行星的无线电波。根据“search for radio waves… stars and planets”可知，搜索来自恒星和行星的无线电波，from“来自”，故填from。
28．句意：Green Bank的孩子们并没有完全与世界隔绝。根据“cut off from the world”及备选词可知，此处指并没有完全与世界隔绝，副词completely表示“完全地”，故填completely。
29．句意：家庭电脑连接到互联网，但速度很慢。“Home computers are connected to the Internet”与“the speed is slow”是转折关系，用but连接，故填but。
30．句意：孩子们可以花时间照顾宠物或农场动物。根据“spend time… for pets or farm animals.”及备选词可知，此处指照顾宠物或动物，care for“照顾”，spend time doing sth“花时间做某事”，动名词作宾语，故填caring。
31．C 32．E 33．B 34．A 35．F
【导语】本文主要是一则关于三星堆情况的对话。
31．根据“What did you do last weekend ”可知，这里介绍上周末做的事情。选项C“我去了三星堆。”符合语境。故选C。
32．根据“Covering 12 square kilometers, Sanxingdui, which was first discovered accidentally (偶然地) by local farmers in 1929, is located in Guanghan, about 60 kilometers from Chengdu. It’s believed to be the symbol of the ancient Shu Kingdom. The kingdom was a center of civilization (文明) along the Yangtze River.”可知，这里询问更多关于三星堆的其他方面的内容。选项E“哇，太神奇了！还有更多的吗？”符合语境。故选E。
33．根据“I think the new discoveries will help to better understand many unexplained findings of Sanxingdui culture.”可知，这里对于上述的观点表示认可。选项B“是的，了解古代中国很好。”符合语境。故选B。
34．根据“For sacrifice (祭祀). ”可知，这里询问用处。选项A“它们是用来干什么的？”符合语境。故选A。
35．根据“Yes. These new discoveries Sanxingdui had a close connection with Liangzhu Culture in Zhejiang province which has a history of 4, 300 years to 300 years.”可知，这里为一般疑问句，询问三星堆是否是一个中国文明的发祥地。选项F“它是中国文明的发祥地之一吗？”符合语境。故选F。
36．B 37．C 38．A 39．C 40．B 41．C 42．A 43．C 44．B 45．C
【导语】本文主要讲述了森林的重要性，呼吁我们要采取措施保护森林。
36．句意：树木构成森林并产生氧气。
discover发现；produce生产；destroy破坏。根据“Trees make up the forest and...oxygen”可知树木产生氧气。故选B。
37．句意：众所周知，我们不能没有氧气。
besides除此之外；with和；without没有。根据“we can’t live...oxygen”可知没有氧气我们不能生存。故选C。
38．句意：森林为动物提供了一个舒适温暖的家。
offers提供；builds建造；develops发展。根据“animals a comfortable and warm home”可知森林为动物们提供了家。故选A。
39．句意：但许多人无法意识到森林的重要性。
price价格；number数字；importance重要性。根据“a lot of people can’t realize(意识到) the...of forest”可知是没有意识到森林的重要性。故选C。
40．句意：如果我们继续砍伐它们，野生动物将失去家园，天气将变得可怕。
although虽然；if如果；so所以。“we go on cutting down them”是“the wild animals will lose their homes”的条件，用if引导条件状语从句。故选B。
41．句意：如果我们继续砍伐它们，野生动物将失去家园，天气将变得可怕。
weak虚弱的；quiet安静的；terrible糟糕的。根据“the wild animals will lose their homes and the weather will become”可知如果继续砍伐树木，天气将会变坏。故选C。
42．句意：现在是我们做点什么来为我们美丽的生活拯救森林的时候了。
something一些事；anything任何事；nothing没有事。根据“It’s time for us to do...to save forests”可知是做一些事情来拯救森林。故选A。
43．句意：让我们采取行动。
chances机会；advice建议；action行动。根据“We should stop cutting too many trees”可知要采取行动保护森林。故选C。
44．句意：我们应该停止砍伐太多的树木，停止使用木制的东西，比如木制的筷子。
according to根据；such as例如；as long as只要。根据“stop using wooden things...wooden chopsticks”可知此处是举例，用such as。故选B。
45．句意：只有这样，我们才能在未来过上舒适的生活。
by通过；at在；in在……里。in this way“用这种方式”。故选C。
46．B 47．D 48．B 49．C 50．C
【导语】本文主要介绍风力发电的情况，包括它的优点和缺点。
46．细节理解题。根据“New windmills spin slowly, and they aren’t dangerous for birds.”可知，新的风车旋转得很慢，它们对鸟类没有危险可知，故选B。
47．细节理解题。根据“For thousands of years, people have used wind to sail boats and move water. ”可知，人们使用风力已经不止1000年了，故选D。
48．细节理解题。根据“Also, wind power is cheap, and it’s getting even cheaper.”可知，风力正变得更加便宜，故选B。
49．最佳标题。根据“Wind power is a very clean source of energy”以及“Wind power is a very popular source of energy.”可知，本文主要介绍了又干净又受欢迎的风能，故选C。
50．推理判断题。根据“About 2.5 percent of the world’s power comes from the wind”可知，世界上大约2.5%的电力来自风能，而不是25%，C表述错误，故选C。
51．C 52．A 53．D 54．A 55．C
【导语】本文主要介绍了中国的第7次人口普查，并讲述了人口普查的历史以及人口普查的范围和意义。
51．细节理解题。根据“This census is different from the ones in the past. For the first time, citizens were encouraged to use smartphones and other digital tools to record their information.”可知，2020年人口普查不同于以前人口普查的原因是使用了智能手机和其他数据工具记录普查信息。故选C。
52．细节理解题。根据“China has a national population census every 10 years. The first one was done in 1953.”可知，第一次人口普查是在1953年。故选A。
53．词句猜测题。根据“The first one was done in 1953. At that time, there were about 600 million people in China. But China’s population has boomed. It was about 1.37 billion in 2010.”可知，在1953年人口普查数据是大约600万人，到了2010年大约是13.7亿人，因此人口是增长了，可推知boom表示“增长”。故选D。
54．细节理解题。根据“For the 2020’s national population census, all people of China were included in the census. But Chinese citizens who had settled(定居) abroad and foreigners who were staying in China on either business or tourist visas(旅游签证) were not counted.”可知，2020年人口普查没有包含中国居民定居在国外的、持商务签证或旅游签证在中国停留的外国人，因此排除BCD选项。故选A。
55．细节理解题。根据“It will help improve infrastructure(基础建设) and public services. ”可知，通过人口普查可以帮助改善基础建设和公共服务。故选C。

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