Unit3 The earth 单元检测卷（含解析）

中小学教育资源及组卷应用平台
2022-2023学年深圳牛津版七年级上册
Unit 3 The earth单元检测卷（含解析）
一、单项选择
1．There ________ many kinds of animals living ________ the Earth.
A．are; on B．is; in C．are; at D．is; by
2．Our school library ________ us with many books.
A．takes B．gives C．provides D．has
3．We should help our parents ________ some easy ________.
A．do; houseworks B．doing; houseworks
C．to do; houseworks D．do; housework
4．—People can find ________ useful information on the Internet.
—Yes. It’s important ________ to use computers.
A．a large amount of; learning B．a large number of; to learn
C．a large number of; learning D．a large amount of; to learn
5．There is ________ salt in the bottle. Could you pass me another one
A．a few B．little C．few D．a little
二、语法选择
阅读下面短文，按照句子结构的语法和上下文连贯要求选出最佳选项。
The Earth is a beautiful place.
There ___6___ forests and rivers, mountains and fields. Some places are very hot, and some are very cold.
There are many different plants. Some are large. Some are small. All plants need light and water. There are different animals on Earth ___7___. Some live on the land. Some fly in the sky. Some live under the water.
There are also many people ___8___ you and me on Earth. The Earth provides us ___9___ air, water and food. It is __10__ home.
Today, there ___11___ a lot of pollution. We burn things to make energy. This ___12___ the air. We put our rubbish ___13___ the sea and under the ground. This pollutes the Earth and kills the animals and plants.
We must stop ___14___ these things. It is important ___15___ us to protect the Earth for our future.
6．A．is B．are C．was D．were
7．A．too B．either C．also D．as well
8．A．as B．for C．like D．to
9．A．for B．from C．with D．by
10．A．me B．we C．you D．our
11．A．have B．has C．is D．are
12．A．polluting B．pollutes C．pollute D．pollution
13．A．on B．under C．into D．behind
14．A．doing B．do C．to do D．does
15．A．at B．of C．to D．for
三、完形填空
Car Free Day was first started by 34 cities in France on September 22nd, 1998. It was started to protect the ____16____. By now, more than 1,000 cities ____17____ the world have had a Car Free Day.
The ____18____ Car Free Day in China was in Chengdu in 2001. Other cities, including Taipei, Shanghai and Wuhan, also support the day.
In Beijing more and more people are joining the campaign (活动). It asks drivers to ____19____ their cars at home for one day each month. On that day, people try ____20____, taking the subway or riding a bike to work. It also calls on Beijingers not to use cars on June 5th (World Environment Day). The slogan for the day is, “If we drive for one ____21____ day, we can have one more nice day.”
More and more ____22____ have shown their support. “We cannot control (控制) the weather, ____23____ we can choose not to drive,” said Wu Zonghua, a car club chairman. In the year of 2021, Beijing had 288 blue ____24____ days. While in the first quarter of 2012, Beijing only had 52 blue sky days. This was 11 days less than the number for the same period the year before. Much of the dust comes from the desert, but cars cause most of the air ____25____. We must do more for Car Free Day.
16．A．space B．future C．environment D．peace
17．A．around B．up C．down D．after
18．A．lost B．best C．next D．first
19．A．use B．leave C．wash D．drive
20．A．walking B．standing C．believing D．shaking
21．A．much B．less C．more D．many
22．A．parts B．actors C．engineers D．drivers
23．A．because B．or C．but D．and
24．A．planet B．sea C．water D．sky
25．A．temperature B．pollution C．relationship D．prediction
四、阅读单选
A
Have you heard the grey water Grey water is used water that comes from our houses, such as dishwater, bath and shower water, but does not contain(包含) toilet water. Today, clean water has decreased in many areas of the country. As a result, it has become important to save water by using grey water.
How should you use grey water After you take a bath or a shower, you can collect grey water to wash your cars. Certainly, you can also use it to clean the toilet or water your garden. Although grey water may look “dirty”, it is harmless for flowers or vegetables in the garden. Grey water is filtered(过滤) through the ground, it becomes clean again. If you plan to use grey water to water plants, the most important thing is to use green products when you have a bath or wash clothes and dishes. Some plants can take in some chemicals, but some can’t. So, it might be better to use natural products.
Using grey water can not only save water but also protect the environment. Why not use grey water from now on
26．Where can people get grey water _________
A．At home. B．In reservoirs.
C．In factories. D．In fields.
27．What can we use grey water for _________
A．Washing dishes. B．Taking showers.
C．Cooking meals. D．Cleaning toilets.
28．Why does the author write this text _________
A．To tell people not to use dirty grey water.
B．To advise people to drink grey water.
C．To encourage people to use grey water.
D．To make people use fewer green products.
29．What can be the best title for the text _________
A．It’s time for us to use grey water
B．How to make grey water clean
C．The importance of saving water
D．Grey water is dirty and harmful
B
Trees are important and they can help us in many ways. However, some of them are in danger and need to be taken care of as much as possible. There are some ways to save trees.
Use paper wisely. We can save trees by using paper in a right way. What can we do Use both sides of paper when doing homework. Borrow books to read when you needn’t buy them. Never throw old books away, but be kind to donate them to others who need them. Use cloth towels instead of paper towels.
Plant trees. To save trees, it’s a great idea to plant them. Spring is the best season to plant trees. If everyone around us does it, millions of trees will appear and make our world become green and beautiful.
Tell people to understand the importance of trees and help save trees. Try to write letters to government officials (官员) and persuade (劝) them to use as little paper as they can.
30．How many ways are there to use paper wisely
A．Two. B．Three. C．Four. D．Five.
31．What does the underlined word “donate ”mean
A．Give. B．Sell. C．Throw. D．Lead.
32．Which of the following is TRUE
A．All trees on the Earth are in danger. B．Trees can make our world beautiful.
C．To save trees, never buy books. D．Most people can’t understand trees.
33．The passage mainly wants to tell us ________.
A．why we should save trees B．when to plant trees
C．where to find trees D．how to save trees
C
For most of us, the simple, cheap and common bicycle is just a means of transportation. But the United Nations sees it as a useful weapon to fight climate change.
On March 15, the UN General Assembly passed a resolution (决议) supporting bicycles as a tool for dealing with climate change. The resolution calls on member countries to include bicycles in public transportation options (选择). More cyclists mean fewer greenhouse gases. More specifically, it focuses on bicycle-sharing services.
The resolution is not surprising. On Feb 28th 2022, the UN brought out a new report on climate change. It warns that the global average temperature will rise by 1.5℃ above pre-industrial levels (1850-1900), with more than 40 percent of the world’s population “highly vulnerable (脆弱的)” to climate change.
The UN said transportation is the third-largest source of carbon dioxide (CO ), a greenhouse gas that causes global warming. Choosing a bike over a car just once a day can reduce a person’s transportation carbon emissions (排放) by 67 percent, according to a University of Oxford study.
The UN resolution could be seen as an approval (认可) of China’s 14 years of bike sharing, noted CGTN. More than 360 Chinese cities have bike-sharing systems that deal with nearly 20 million bicycles for an average 47 million trips each day, said China’s Ministry of Transport. It reduces CO by 4.8 million tons every year, according to a 2020 report from the World Resources Institute.
In fact, bikes have been booming worldwide since the COVID-19 outbreak. Cycling to work is a safer choice for many Europeans as they worry about getting infected (感染) on buses and subways. Plus, gyms had to close during months of lockdowns, so people turned to bicycles for exercise, reported China News. In Spain, in May 2020, bike sales increased 22-fold (倍) compared with 2019. In London, large parts of the city are being closed off to cars so that people can walk and cycle safely. Cities like Berlin and Montreal have also added new, wider bike lanes.
34．To deal with climate change, the United Nations encourage member countries to ________.
A．close cities off to cars B．encourage bike riding
C．share people’s bicycles D．repair broken bicycles
35．The underlined word “booming” means ________.
A．促进 B．阻碍 C．激增 D．减少
36．What do we know about China’s bike-sharing industry
A．It serves 47 million people per day.
B．It has reduced 4.8 million tons of CO .
C．Its services in small cities need to be improved.
D．It has played an important role in protecting the environment.
D
How many stars can you see in the night sky If the answer are “just a few” or “none”, you might be living with light pollution.
Light pollution happens when too much man-made light harms nature and people. Scientists find that it is especially harmful to nocturnal（夜间的）animals.
Nocturnal animals sleep in the day and are busy at night. Animal scientist Christopher Kyba says man-made light is “the biggest change” people bring to these animals.
Small animals use darkness to hide from（捕食者）. But, he says, cloudy skies near cities are now “hundreds of times” brighter at night. This means that, for example, cats can catch more mice. Then, we will have too many cats and not enough mice to feed them all.
Baby sea turtles are born on beaches in the nighttime. They find the water by the line of the ocean horizon（海平线）. Man-made light leads them away from the ocean. In Florida alone, “Millions ... die this way every year,” says the US-based International Dark-sky Association.
Also, birds that travel or hunt at night need moonlight and starlight. Man-made light can lead them in the wrong direction（方向）. Every year, millions of birds die by flying into bright-lit buildings.
37．We can know that light pollution comes from ________ from the passage.
A．nature B．nocturnal animals C．man-made light D．stars in the sky
38．According to Paragraph 4, as the night becomes brighter, ________.
A．more animals come out for food B．animals need more food
C．small animals can hide more easily D．it’s easier for predators to catch animals
39．Why do many baby sea turtles die in Florida every year
A．Because birds eat them. B．Because they can’t find the water.
C．Because they are born in the nighttime. D．Because there is not enough food to eat.
40．What’s the story mainly about
A．The harm light pollution brings to animals.
B．The living conditions of nocturnal animals.
C．The changes light pollution brings to people.
D．The reasons why the number of animals is becoming smaller.
五、阅读还原5选5
阅读短文及文后A—E选项，选出可以填入各题空白处的最佳选项，并在答题卡上将该选项涂黑。
Green bags, green clothes, green cars, green energy and green everything! ____41____ Being “green” is a new way to say “helping the environment”.
There are many ways we can be green! ____42____ For example, when we go to the supermarket, we can bring our own bags instead of getting a plastic (塑料的) bag. As for water, we can take a very short shower instead of taking a bath. ____43____
Another way is to use “green” energy. “Green” energy isn’t bad for our environment. ____44____ It also means using less energy. Remember to turn off the lights when you’re not using them. And you can buy things that use less energy. For example, we can buy energy-saving lights.
April 22nd is Earth Day. It is a special day to care about our Earth and think of ways to help our beautiful Earth. ____45____ We all can do something to help every day.
A．We can make less rubbish and use less water.
B．What does it mean to be green
C．But we don’t have to wait until that day to protect our Earth.
D．That means using energy from the wind, water or sun.
E．We can also save the rainwater to water flowers and other plants.
六、短文首字母填空
根据短文写出所缺单词。在填写答卷时，要求写出完整单词。（每空只写一词）
There are a lot of cars, factories in the world so they produce a lot of h___46___ gases. People cut down m___47___ of trees every year to get the wood, which will lead to a great disaster. This is not good for the environment and our human beings will suffer a lot from the bad result. We should try our best to p___48___ the Earth and fight a___49___ the air pollution. For e___50___, we can plant more trees to make the air cool and clean. If we work together, our Earth will become better!
七、完成句子
51．瞧! 房间里没有椅子。
Look! ________ ________ any chairs in the room.
52．对于我们来说，学好英语是很重要的。
It is ________ ________ ________ ________ learn English well.
53．地球上有很多不同的动物。
There are many different animals ________ ________.
54．学校给我们提供一个很好的学习环境。
Our school ________ us ________ a good study environment.
55．不要随处扔垃圾。
Don’t ________ ________ rubbish everywhere.
八、书信作文
56．假如你是Jack，你留意到学校旁边的那条河流污染很严重，打算写一封信给市长，反映该河流污染问题，并呼吁大家保护该河流。可适当发挥，词数60词左右。
内容要点：
1. 很多人把垃圾扔进河里。
2. 一些工厂把废水排进河里。
3. 河水很脏，河里几乎没什么鱼。
4. 对我们来说，保护这条河流是很重要的。
5. 请大家停止污染这条河流。
6. 你的观点。
要求
1. 短文要包括所给的提示信息，可适当发挥。
2. 短文开头部分已给出，不计入总词数。
Dear mayor,
I want to talk to you about the river close to our school.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Best wishes,
Jack
参考答案：
1．A
【详解】句意：地球上生活着多种动物。
考查主谓一致和介词辨析。该句是there be句型，be由离其最近的名词单复数决定，animals是可数名词复数，则第一空填写are；on在……上；at在；in在……里；by被。根据“living ... the Earth”可知，应是生活在地球上，on the Earth表示“在地球上”，是固定短语。故选A。
2．C
【详解】句意：我们学校图书馆为我们提供了许多书。
考查动词辨析。takes拿；gives给；provides提供；has有。根据“Our school library”与“many books”可知，指的是学校图书馆为我们提供了许多书，provide sb. with sth.意为“为某人提供某物”。故选C。
3．D
【详解】句意：我们应该帮助父母做一些简单的家务。
考查非谓语动词和不可数名词。help sb (to) do sth“帮助某人做某事”，固定短语；housework“家务”，是不可数名词，没有复数形式，故选D。
4．D
【详解】句意：——人们可以在网上找到大量有用的信息。——是的，学会用电脑很重要。
考查不可数名词和不定式。a large amount of后面接不可数名词，a large number of后面接可数名词，名词information是不可数名词，应用a large amount of。It is+形容词+to do sth.表示“做某事是怎么样的”，此处不定式作主语，it作形式主语，故选D。
5．B
【详解】句意：瓶子里几乎没有盐了。你能再递给我一甁吗？
考查不定代词。a few一些，修饰可数名词复数，表示肯定意义；little几乎没有，修饰不可数名词，表示否定意义；few几乎没有，修饰可数名词复数，表示否定意义；a little很少，修定饰不可数名词，表示肯定意义。salt是不可数名词用little或a little修饰，排除A、C；根据“Could you pass me another one ”可知，应是没有盐了，空处表示否定意义，用little修饰。故选B。
6．B 7．A 8．C 9．C 10．D 11．C 12．B 13．C 14．A 15．D
【导语】本文主要讲了地球以及地球上的污染，呼吁人类要保护地球。
6．句意：地球上有森林、河流、山脉和田地。
is用于单数；are用于复数；was用于过去时的单数；were用于过去时的复数。根据“...forests and rivers, mountains and fields. ”可知，空格处的be动词要用复数形式，本文时态为一般现在时。故选B。
7．句意：在地球上也有不同的动物。
too也；either也；also也；as well也。根据“There are different animals on Earth...”可知，空格处位于句尾，表示“也”，故选A。
8．句意：在地球上也有许多人像你和我一样。
as诸如；for为了；like像……一样；to到。根据“many people...you and me on Earth.”表示“像你和我一样”要用“like you and me”. 故选C。
9．句意：地球提供给我们空气，水和食物。
for为了；from来自；with和……一起；by通过。“提供给某人某物”的短语是“provide sb. with sth.”。故选C。
10．句意：它是我们的家。
me是I的宾格；we我们；you你；our我们的。根据“It is... home.”可知，空格处要填形容词性物主代词。故选D。
11．句意：今天，有大量的污染。
have有，原形；has有，第三人称单数；is是；are是。根据“there ... a lot of pollution.”可知是there be句型，又因为“pollution”是不可数名词，故选C。
12．句意：这个污染了空气。
polluting是pollute动名词；pollutes是pollute的第三人称单数；pollute是原形；pollution是名词形式。根据“This... the air.”可知，空格处要填pollute的第三人称单数形式。故选B。
13．句意：我们把我们的垃圾扔进海里和地下。
on在……上面；under在……下面；into在……里面；behind在……后面。根据“We put our rubbish...the sea”可知是扔进海里面。故选C。
14．句意：我们必须停止做这些事。
doing是do的动名词形式；do是do的原形；to do是do的不定式；does是do的第三人称单数形式。根据stop的用法可知，停止做某事是“stop doing sth.”。故选A。
15．句意：对于我们来说为了我们的未来保护地球是重要的。
at在；of……的；to朝；for为了。根据“It is important for sb. to do sth.”的用法可知，空格处要填for。故选D。
16．C 17．A 18．D 19．B 20．A 21．B 22．D 23．C 24．D 25．B
【导语】本文主要介绍了“无车日”开始的时间，发起的国家，以及在中国的一些城市，尤其是北京在“无车日”和“世界环境日”中所做出的贡献等。
16．句意：它是为了保护环境而开始的。
space太空；future未来；environment环境；peace平静。根据“Car Free Day”及常识可知，“无车日”是为了保护环境，故选C。
17．句意：到目前为止，全球已有1000多个城市设立了无车日。
around在周围；up向上；down向下；after在……后面。around the world“全世界”，固定搭配，故选A。
18．句意：中国首个无车日于2001年在成都举行。
lost丢失；best最好；next下一个；first第一。根据“Other cities, including Taipei, Shanghai and Wuhan, also support the day”可知，此处指首个无车日，故选D。
19．句意：它要求司机每个月把车停在家里一天。
use使用；leave离开；wash洗；drive驾驶。根据“their cars at home”可知，此处指把车停留在家里，故选B。
20．句意：在那一天，人们尝试步行、乘地铁或骑自行车去上班。
walking散步；standing站立；believing相信；shaking摇摆。根据“taking the subway or riding a bike to work”可知，“无车日”这一天尝试采取别的交通方式，例如步行，乘地铁等，故选A。
21．句意：如果我们少开一天车，就能多过一天好日子。
much许多；less较少；more更多；many许多。根据“If we drive for one ... day, we can have one more nice day”可知，此处建议少开车，故选B。
22．句意：越来越多的司机表示支持。
parts部分；actors演员；engineers工程师；drivers司机。根据“said Wu Zonghua, a car club chairman”可知，司机表示支持，故选D。
23．句意：我们不能控制天气，但我们可以选择不开车。
because因为；or或者；but但是；and和。“We cannot control (控制) the weather”与“we can choose not to drive”是转折关系，故选C。
24．句意：2021年，北京蓝天天数达到288天。
planet星球；sea大海；water水；sky天空。根据“Beijing had 288 blue…days”可知，此处介绍蓝天的天数，故选D。
25．句意：大部分灰尘来自沙漠，但汽车造成了大部分空气污染。
temperature温度；pollution污染；relationship关系；prediction预测。根据“Much of the dust comes from the desert, but cars cause most of the air”可知，汽车产生了污染，故选B。
26．A 27．D 28．C 29．A
【导语】本文主要讲述了什么是灰水及如何使用灰水来节约用水。
26．细节理解题。根据“Grey water is used water that comes from our houses,”可知，人们可以从家里得到灰水。故选A。
27．细节理解题。根据“Certainly, you can also use it to clean the toilet or water your garden.”可知，灰水可以用来清洁厕所。故选D。
28．推理判断题。根据“Using grey water can not only save water but also protect the environment. Why not use grey water from now on ”可知，作者写这篇文章是为了鼓励人们使用灰水。故选C。
29．最佳标题题。根据“Using grey water can not only save water but also protect the environment. Why not use grey water from now on ”可知，作者写这篇文章的目的是鼓励人们使用灰水。所以“是我们使用灰水的时候了”作为标题最恰当。故选A。
30．C 31．A 32．B 33．D
【导语】本文主要介绍了保护树木的几种方法。
30．细节理解题。根据“Use both sides of paper when doing homework.”，“Borrow books to read when you needn’t buy them.”，“Never throw old books away, but be kind to donate them to others who need them.”和“Use cloth towels instead of paper towels.”可知有四种用纸方法，故选C。
31．词句猜测题。根据“Never throw old books away”和“to others who need them”可知不要扔掉旧书，把它们送给需要的人，可推测“donate”意为“赠送”，与“Give”同义。故选A。
32．细节理解题。根据“millions of trees will appear and make our world become green and beautiful”可知树木可以使我们的世界更美丽，故选B。
33．主旨大意题。根据“There are some ways to save trees.”以及下文详细内容可知，本文主要介绍了如何保护树木，故选D。
34．B 35．C 36．D
【导语】本文主要讲联合国呼吁推广自行车以应对气候变化。
34．细节理解题。根据“On March 15, the UN General Assembly passed a resolution supporting bicycles as a tool for dealing with climate change. The resolution calls on member countries to include bicycles in public transportation options.”可知为了应对气候变化，联合国鼓励成员国支持骑自行车。故选B。
35．词义猜测题。根据“Cycling to work is a safer choice for many Europeans as they worry about getting infected on buses and subways.”可知骑自行车去上班是新冠肺炎爆发后更安全的选择，由此推出骑自行车的人激增，blooming“激增”。故选C。
36．细节理解题。根据“More than 360 Chinese cities have bike-sharing systems that deal with nearly 20 million bicycles for an average 47 million trips each day, said China’s Ministry of Transport. It reduces CO2 by 4.8 million tons every year, according to a 2020 report from the World Resources Institute.”可知中国的共享单车产业在保护环境方面扮演者重要角色。故选D。
37．C 38．D 39．B 40．A
【导语】本文主要介绍了光污染给大自然里的动物以及人类所带来的危害。
37．细节理解题。根据第二段“Light pollution happens when too much man-made light harms nature and people.”可知，光污染来自人造光。故选C。
38．推理判断题。根据第四段“Small animals use darkness to hide from（捕食者）.”可知，小动物们利用黑暗躲避捕食者，当夜晚变亮后，捕食者们就很容易抓到小动物。故选D。
39．推理判断题。根据第五段“They find the water by the line of the ocean horizon（海平线）. Man-made light leads them away from the ocean.”可知，乌龟在海平线边找到水，但是人造光引导他们远离大海，所以造成乌龟大量死亡。故选B。
40．主旨大意题。本文主要介绍光污染对动物和人类的伤害。故选A。
41．B 42．A 43．E 44．D 45．C
【导语】本文讲述了绿色生活以及呼吁大家保护地球。
41．根据“Being ‘green’ is a new way to say ‘helping the environment’.”可知此处是指“绿色”的定义，选项B“绿色意味着什么？”符合语境，故选B。
42．根据“There are many ways we can be green!”可知有很多方法可以让我们变得环保，选项A“我们可以制造更少的垃圾和使用更少的水。”符合语境，故选A。
43．根据“As for water, we can take a very short shower instead of taking a bath.”此处是和节约用水有关，选项E“我们也可以节省雨水来浇花和其他植物。”符合语境，故选E。
44．根据“ ‘Green’ energy isn’t bad for our environment.”可知此处是指绿色能源，选项D“这意味着使用来自风、水或太阳能的能源。”符合语境，故选D。
45．根据“It is a special day to care about our Earth and think of ways to help our beautiful Earth...We all can do something to help every day.”可知保护地球从现在做起，选项C“但我们不必等到那一天才去保护我们的地球。”符合语境，故选C。
46．(h)armful 47．(m)illions 48．(p)rotect 49．(a)gainst 50．(e)xample
【导语】本文主要介绍了很多汽车和工厂造成的污染，人们砍伐树木，这些都会给人们带来巨大的灾难，呼吁人们应该行动起来保护地球。
46．句意：世界上有很多汽车和工厂，所以它们会产生很多有害气体。根据“There are a lot of cars, factories in the world so they produce a lot of … gases”及首字母可知，这些汽车和工厂产生有害的气体，harmful“有害的”，形容词作定语，故填(h)armful。
47．句意：人们每年砍伐数百万棵树来获取木材，这将导致一场巨大的灾难。根据“People cut down…of trees”及首字母可知，砍伐数百万棵树，millions of“数百万的”，故填(m)illions。
48．句意：我们应该尽最大努力保护地球，与空气污染作斗争。根据“We should try our best to …the Earth”及首字母可知，应该保护地球，protect“保护”，try one’s best to do sth“尽某人最大努力做某事”，此空应填动词原形，故填(p)rotect。
49．句意：我们应该尽最大努力保护地球，与空气污染作斗争。fight against“与……作斗争”，固定搭配，故填(a)gainst。
50．句意：例如，我们可以种更多的树来使空气凉爽干净。根据“For …we can plant more trees to make the air cool and clean”及首字母可知，此处举例子如何保护地球，for example“例如”，故填(e)xample。
51． There aren’t
【详解】根据题干，应用there be句型表示“某地有某物”，此处应用否定句表示没有，主语为chairs是复数形式，be用are，其否定形式为aren’t，there首字母需大写。故填There；aren’t。
52． important for us to
【详解】根据中英文对照可知，空处表达的意思“对我们来说……是重要的”，使用句型：it is+形容词+for sb to do sth“做某事是……的”，important“重要的”，us“我们”，故填important；for；us；to。
53． on Earth
【详解】on Earth“地球上”，固定搭配，故填on；Earth。
54． provides with
【详解】provide sb. with sth.表示“给某人提供某物”。分析语境可知，该句时态为一般现在时，school做主语，谓语动词要用第三人称单数。故填provides；with。
55． throw away
【详解】throw away“扔掉”，此句是祈使句的否定形式，don’t+动词原形，故填throw；away。
56．例文
Dear mayor,
I want to talk to you about the river close to our school.
The river is very dirty now. Many people throw rubbish into the river. Also, some factories pour waste water into it. As a result, it becomes very dirty. I know there were lots of fish in the river before. The dirty water killed most of the fish and there are few in it now. If there is no clean river, the fish will all die one day.
I think it is very important for us to protect our environment. We can’t live without the fresh air and water. Let’s stop polluting the river. I hope that everyone will take some measures to protect our home.
Best wishes,
Jack
【详解】[总体分析]
①题材：本文是一篇应用文，是书信作文；
②时态：时态为“一般现在时”，“一般过去时”与“一般将来时”；
③提示：写作要点已给出，考生应注意不要遗漏“内容要点”中的提示内容，适当添加细节，并突出重点。
[写作步骤]
第一步，表明写作意图。以“我想和你谈谈我们学校附近的那条河”来引出下文；
第二步，具体阐述写作内容。描述被污染的河流的现状；
第三步，书写结语。表明自己的观点，表达“希望大家停止污染、一起保护环境”的美好愿望。
[亮点词汇]
①waste water废水
②As a result结果
③take some measures采取一些措施
[高分句型]
①If there is no clean river, the fish will all die one day.（if引导的条件状语从句）
②I think it is very important for us to protect our environment.（省略that的宾语从句；“it is+adj.+for sb. to do sth.”句型）
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