Unit 13 课时训练 2024-2025学年人教版九年级英语全册

巴中龙泉外国语学校英语学科课时作业 班级：____________姓名：____________ 建议____min完成 初2022级英语备课组 Unit 13 We’re trying to save the earth! 第一课时Section A（1a ~ 2d） 一、根据句意和汉语提示写出所缺的单词。 1. Don’t throw the (垃圾) on the ground. You should throw it into the bin. 2. Can you find something special in the (底部) of the bottle? 3. Some (渔民) lived in the small village. 4. The lady is (难看的), but she likes to dress up as a princess. 5. What’s the (优点) of the new project? 6. You can put it into the (塑料的) bag. 二、单项选择题。 ( )1.—Smart phones are more and more popular now. —So they are. But they still _________ too much. A. pay B. cost C. take D. spend ( )2.A robot has lots of ____. It can help humans do hard and dangerous work. A. courage B. experiences C. advantages D. knowledge ( )3.—Let’s go hiking _______ staying at home, shall we? —A good idea. A. as well as B. in order to C. instead of D. even though ( )4.I am afraid we cannot______ to take a taxi.Let’s go by underground instead. A. refuse B. afford C.forget D.fall ( )5.We must do something useful to ____ pollution. A. cut off B. cut up C. cut down D. cut in ( )6.There is a big hole______ the box. A. at the bottom of B. at top of C.at the bottom D.at the bottom of 三、完形填空。 March 22nd is World Water Day.It started in 1993.It not only makes us think about the importance of water, but also calls on us to 　1　 and protect water.Today, we’re facing terrible water problems.Among them, the wastewater problem is rather 　2　. And the subject of World Water Day in 2017 is “wastewater”.  What is wastewater? It is used water.Usually, wastewater comes from homes, 　3　, hospitals and so on.It is produced by different kinds of activities, including washing the machines, taking showers and using kitchens.The rain also 　4　 wastewater when it is running down the street during a storm.No matter where it comes from, this kind of water is sure to have 　5　 harmful in it.  　6　must we treat(处理) wastewater? Wastewater has a big influence on our lives.It causes both illness for us and pollution for the environment.We must care for our environment and our own 　7　.  How can we treat wastewater? Different kinds of wastewater need different ways of treatment.Wastewater 　8　 homes can be reused.Then there will be 　9　 wastewater. Also, factory wastewater has to be cleaned 　10 it goes back to nature.  1．A．drink B．save C．carry D．watch 2．A．easy B．popular C．small D．serious 3．A．factories B．lakes C．rivers D．seas 4．A．gets back B．hands in C．changes into D．picks up 5．A．nothing B．something C．nobody D．somebody 6．A．What B．Who C．Why D．How 7．A．work B．interest C．health D．business 8．A．on B．for C．with D．from 9．A．less B．more C．better D．worse 10．A．and B．whether C．after D．before 四、阅读理解。 There are some easy things you can do to protect the environment and the earth. Choose ideas from the list or come up with a few of your own. ·Plant flowers, grass or trees. ·Whenever you visit a park or beach, take away what you bring there—keep rubbish in a bag until you can put it in a dustbin. ·Turn off the lights and TV sets when you leave the room. This can save a lot of electricity. ·Turn off the tap when you brush your teeth. You can save some water by not letting it run. Also, use a glass cup instead of a paper cup because this saves paper. ·Keep the doors and windows closed in winter to keep warm air in. ·Give your old books and magazines to a library instead of throwing them away. ·Give your old clothes to poor children you know instead of throwing them away. ·Use both sides of paper. ·Stop pouring dirty water into the rivers or lakes nearby. ·Encourage all your friends to do the same things you do to help protect the earth. You don’t have to wait until Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the environment, the world will become much more beautiful. (　　)1. From the above, we know that this is_______. A. a sign B．a proposal (倡议书) C. an advertisement D．a notice (　　)2. The writer tells us _______. A．to throw rubbish in to a dustbin B．to pour dirty water into the rivers C．to save water D．we can’t do these things until Earth Day (　　)3. We can _______to save paper. A．use a paper cup B．use both sides of paper C．give old books to a library D．pick up waste paper at a school (　　)4. Which of the following is wrong according to the writer? A．Turn off the lights when leaving the room. B．Close the doors and windows in winter. C．Use a paper cup when brushing your teeth. D．Give your old clothes to the poor children. (　　)5. What’s the best title of the passage? A．Protect the Earth B．Save Water and Electricity C．Make Better Use of Old Things D．Save Money 五、阅读还原。 In Australia there is a famous island called Fraser Island. A great many visitors come here for holidays every year. Why? The reason is that it is special. 1 . In fact, it is the largest sand island in the world. It's about 200 kilometers long and 240 kilometers wide. Though the island is a popular place of interest, there is no airport on the island. The long beach along the east coast works as the airport. 2 . On the island there are sand hills without any plants, but there are forests with old trees, beautiful flowers and over a hundred lakes, too. 3 . Every year, visitors come to enjoy the island's natural beauty. People like camping and hiking there. 4 . Animals were killed for food and this made them in danger of extinction (灭绝). They threw rubbish everywhere, and the lakes were seriously polluted. 5 . Rules have been set up. For example, visitors are not allowed to use motorboats (摩托艇) or go fishing in the lakes, and they mustn't leave any rubbish. A . Planes arrive and leave from here A. The island is completely made of sand B. Unluckily, visitors have caused many problems D．Many kinds of birds and animals live in the forest E．So it is time to protect the environment of the island Unit 13 We’re trying to save the earth! 第二课时Section A（3a ~ 4c） 一、根据句意及所给汉语提示，用恰当的短语填空。 1.One third of boys in my class ______________(参加) the running race last week. 2.If you don’t work hard now, you’ll ______________(为……付出代价) it later when you fail your exams. 3.Last month they ________________(采取行动) to prevent water pollution. 4.Insects are fairly low on ________________(食物链). 5.One of his fingers was ________________(切掉) in the accident. 二、完形填空。 A desert is a large area of land. There is 1 rain and not many plants. The size and the place of the world’s deserts are always changing. In the last hundred years, deserts have 2 more and more. That’s mainly 3 men. In the 19th century some people brought a little animal called rabbit to Australia from England. Today there are 4 them .They eat every plant which they can see. The great desert in the center of Australia is becoming 5 . There are places in North Africa where great cities once stood. There 6 to be gardens and trees and grass. But now these places are deserts. Scientists studied the land to 7 what happened. Many of them thought the land disappeared when the trees were 8 down. Trees help other plants grow .And they keep the earth from being blown (吹) away. In forests, leaves on the ground keep rainwater from running off. Men can make deserts, but they can 9 stop them from getting bigger. For example, in China, the Great Green Wall was 10 and it has already saved a lot of land. But more “Great Green Walls” are still needed all over the world. Can we stop deserts from getting bigger and save the land? Yes, we can. And we must. 1．A．a little B．a few C．very little D．very few 2．A．formed B．made C．taken D．become 3．A．for B．since C．as D．because of 4．A．thousand B．millions C．thousands D．millions of 5．A．better B．bigger C．less D．smaller 6．A．used B．came C．had D．made 7．A．find B．find out C．look D．look for 8．A．broken B．cut C．pulled D．fallen 9．A．also B．too C．either D．neither 10．A．heard B．won C．built D．Made 三、阅读理解。 Many people know that rubbish is a big problem on planet Earth. What many people don't know is that junk(垃圾)has become a problem in outer space too. According to BBC News, there are more than 22, 000 pieces of space junk floating around the earth. And these are just the things that we can see from the surface of the earth by telescopes (望远镜). There are also millions of smaller pieces of junk that we can't see. Objects, like bits of old space rockets or satellites, move around the planet at very high speeds fast that even a very small piece can break important satellites or become dangerous to astronauts. If the tiniest piece of junk crashed into a spaceship, it could damage the vehicle. To make things worse, when two objects in space crash, they break into many smaller pieces. For example, when a U.S. satellite hit an old Russian rocket in 2009, it broke into more than 2,000 pieces, increasing the amount of space junk. To reduce additional space junk, countries have agreed that all new space tools can only stay in space for 25 years at most. Each tool must be built to fall safely into the earth's atmosphere after that time. In the upper parts of the atmosphere, it will burn up. Many scientists also suggesting different ways to clean up space junk. In England scientists are testing a metal net that can be fired into space junk. The net catches the junk and then pulls it into the earth's atmosphere to burn up. The Germans are building robots that can collect pieces of space junk and bring them back to Earth to be safely destroyed. The problem is becoming more challenging because we're sending more objects into space to help people use their mobile phones and computers,” says Marco Castronuovo, an Italian space researcher.“The time to act is now. The longer we leave the problem, the bigger it will become,” he says. ( )1．What does the underlined word “these” in Paragraph 2 refer to? A．Telescopes. B．Satellites. C．Pieces of space junk. D．BBC news reports. ( )2．Why is space junk considered a problem? A．It buns up after it re-enters the atmosphere B．It often stops the view of telescopes on Earth C．It could force new space tools to travel at slower speeds D．It may crash into other space tools causing damage or death ( )3. Countries want future space tools to be able to fall back into the earth's atmosphere so that_______. A．the tools can be reused later B．the tools don't become space junk C．the earth’s atmosphere can stay clean D．the effects of space flight can be studied ( )4．How do the Germans plan to deal with space junk? A．Catch it with nets. B．Use robots to collect it. C．Burn it in the earth's atmosphere. D．Send it further away from the earth. ( )5．In which section of the newspaper would you probably read this article? A．Environment. B．Local News. C．Education. D．Fashion. 四、阅读还原。 How's it going? Sorry I haven’t been in touch for a while, but I couldn't use my computer for a few days. You'll never guess what happened to me! A couple of weeks ago, I decided to take up yoga. Yoga is combination of physical and breathing exercises. 1 . I've been feeling a bit stressed about my school work recently and I thought yoga might help. My dad couldn't give me a lift to the first lesson, so I decided to go to the gym by bike. The lesson was great and I felt really relaxed afterwards. 2 . The next day, I woke up with a bad cold. I couldn't stop coughing and sneezing. I couldn't go to school. because I also had a high temperature. We were having a maths test that day so it was great that I could stay at home. I didn't really enjoy my day off though. I felt awful and stayed in bed. Mum brought me cups of hot tea for my sore throat and you know how much I hate tea 3. I have to keep taking these for a while so I can get stronger.That afternoon Robbie came to visit me. He said he’d got something to cheer me up and pretended it was the math test that I missed. "Mr Banks says do it at home instead ,”he said , but I knew he was joking. 4. . The next day, I was a bit pale and didn't have much energy, but I was feeling better. The day after that, I was able to go back to school.Can you believe my luck? 5. .Anyway, you're OK. Write and let me know what you've been up to! Bye for now! Kate A .She also went to the chemist’s and got me some vitamin pills. B. On the way home , though, it started raining and I got very wet. C. When I was going home, I fell off the bike and hurt my leg. D. I didn’t think it was very funny, but he did! E. It’s supposed to be good for relaxation and keeping fit. 五、短文填空。 We had a chemistry class yesterday.We learned about the importance of 1 our environment.Mr. Zhao told us that he was very worried about the 2 in our city. He said that our city used to be beautiful. People could enjoy the beauty of 3 , such as green mountains，clean water and fresh air. But in recent years the beauty has gone． In public places, we can see some people drop litter, spit and draw casually on walls. All of these are bad 4 our environment. As middle school students, we should try our 5 to do something to protect the environment. For example, we can pick up waste paper on the ground and throw 6 into the dustbin（垃圾箱）. Pollution is not only the problem of our city, but also the problem of our 7 and even in the world. It’s everyone’s 8 to protect the environment, 9 we have only one earth.We should do it from every small thing around 10 . Then we will make our earth more beautiful and cleaner. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Unit 13 We’re trying to save the earth! 第三课时Section B（1a ~ 2e） 一、单项选择题。 ( )1.The old text books can be _______by students in lower grade. A. reused B. recycled C. reduced D. repeated ( )2. Amy keeps making a contribution to protecting the environment. And she’s________ inspiration to us all. A .a B. an C. the D./ ( )3.I think all of us need to rethink our attitudes toward health and sickness. A. consider B. watch C. think twice D. change ( )4.—Why will they _______that old cinema? —They want to build a new shopping mall there. A. set up B. fix up C. pull down D. take away 三、阅读理解。 A 　I’m sure you all know how important recycling is. Recycling is when you take old things and turn them into new things. It sounds like magic. But it’s actually very scientific. Materials The first thing you have to do is collect items that can be recycled. Only certain materials can be recycled. These include things made out of paper, metal, glass and plastic. Daily things Can you think of everyday items made of these materials? Soda cans are a good example. They are made out of metal. Magazines and newspapers are made out of paper. So are cereal boxes. Some bottles of juice are made out of glass. Bags and yogurt containers are made out of plastic. There are many things that can be recycled. Loop These things are usually stamped with the recycling loop. It has 3 arrows that go in a triangular (三角形的) circle. This shows that the cycle (循环) continues. Items are thrown away but continue their lives as something else. Process Let’s go back to the process of recycling. ①The items are put in a recycling bin. ②A truck carries the items to a recycling plant. ③The materials are separated and squashed into square cubes. ④Companies buy and turn them into new products. ( )1．What is “recycling” according to the passage? A．It’s a magic performance. B．It’s a way of burning old things. C．It’s a way to make old things useful. D．It’s scientific research. ( )2．Which material is not mentioned in the passage? A．Rubber. B．Metal. C．Glass. D．Plastic. ( )3．You can put your old things into a recycling bin EXCEPT _________. A．soda cans B．magazines C．cereal boxes D．all bottles ( )4．The “3 arrows” shows that the items _________. A．have some valuable stamps B．are in a triangular circle C．are recycled and reused D．are thrown away ( )5．The passage is mainly about _________. A．recyclable materials B．recyclable daily things C．the recycling process D．recycling in a scientific way B A large part of China experienced larger amounts of smog (雾霾) than usual this January and the air was badly polluted.The distance one could see was shorter than 1,000 meters in Beijing, Tianjin, and the provinces of Hebei, Henan, Shandong and Anhui.In some areas, it was down to 200 meters. 　People usually set off firecrackers(爆竹)to celebrate the Spring Festival.But because of the smog, this year seemed very quiet.It was really different.A man called Zhang Wei said that his friends and he hadn’t set off a single firecracker. 　“We all suffered from last month’s smog.If we don’t call an end to the firecrackers, the environment will get worse and worse during the holiday.” said Zhang Wei.He called on more people to set off fewer firecrackers during this year’s Spring Festival holiday by putting up a notice in his neighborhood. 　More Chinese looked forward to celebrating the holiday in a greener way.They decided not to set off firecrackers.They also decided not to waste food.They said that the new celebrations sounded fashionable. 　To clean the sky, more than ten provinces including Guangdong, Zhejiang and Jiangsu have started to use national 4 standard (标准), which is expected to reduce vehicle emission (车辆排放)by 30% to 50%.Beijing even has started to use the stricter national 5 standard. 　We still have a lot to do to improve the air quality.For example, using public transportation as much as possible is not a hard thing for us to do, but it matters a lot. ( )1. What happened in a large part of China this January? A. It experienced larger amounts of smog. B. People set off lots of firecrackers. C. There was a heavy rain. D. Many car accidents happened. ( )2. How do people usually celebrate the Spring Festival in China? A. By putting up a notice. B. By setting off firecrackers. B. By not wasting food. D. By using public transportation. ( )3. How many provinces have started to use national 4 standard? A. Three. B. Six. C. Eight. D. More than ten. ( )4. Which of the following is NOT true according to the passage? A. Zhang Wei didn’t set off a single firecracker this Spring Festival. B. We should use more public transportation to help reduce the air pollution. C. Zhejiang has started to use national 4 standard to reduce vehicle emission. D. More Chinese think the celebration of setting off firecracker is fashionable. ( )5. What’s the best title for the passage? A. How to reduce the vehicle emission B. How to improve the air quality C.What do Chinese do in Spring festival D. Using public transportation 四、阅读填空。 Almost a seventh of China has been under heavy smog. The air pollution in 20 cities has reached the “danger level”. China is not alone, however. Many countries have the same situation. The air pollution is a problem from which we can't hide. The United States Since the beginning of the 19th century, America has had trouble with environmental problems, air pollution in particular. Almost 60 percent of Americans live in areas, where air pollution has reached unhealthy levels. It can make people sick. The US created the Environmental Protection Agency in 1970 and passed the Clean Air Act. Now the air  all over the country is much cleaner, especially compared to ten years ago. London Yellow­grey smog was a frequent visitor to London in the 1950s and got the name “London fog”. The heaviest, which shocked the world, was in 1952. Because of cold weather and windless conditions, polluted air covered the city. People could see something around them only in a few meters and about 4, 000 people died. In 1956, London passed the Clean Air Act. It largely reduced air pollution. New Delhi Because New Delhi is developing fast, its air quality is even worse than that of Chinese cities. New Delhi has done little to improve air quality in recent years. However, the city government made a few changes more than 10 years ago. They moved industry out of the city, built a subway and improved public transport. 根据短文内容，完成下面的表格。 World Battles Against Air Pollution China As for the air pollution, China is not 1 ； many countries have the same situation. The United States About 60 percent of Americans live in areas, where 2 has reached unhealthy levels. The Environmental Protection Agency 3 by the US in 1970. London In 1952, the 4 smog shocked the world. New Delhi Because New Delhi is developing fast, its air quality is even 5 than that of Chinese cities. 1. 2. 3. 4. 5. Unit 13 We’re trying to save the earth! 第四课时Section B（3a ~ self check） 一、根据句意及所给汉语提示，写出句中所缺单词的正确形式。 1.We will meet at the school _____________(大门) this afternoon. 2.I’m thirsty. I’d like a ___________ (瓶) of orange juice. 3.The ruler is made of______________ (金属). 4.Why haven’t you bought a car, Mr. Li? You can ___________(买得起) one. 5.I think the writer’s_______________ (作品) usually express strong feelings. 二、完形填空。 I live in Missouri, near a river called the Jacks Fork. Before I was born, my grandparents decided to help keep the    1    clean. So they started a club called Stream Team 713. I like its another    2    better — the Jacks Fork River Rats! Our club makes sure the water is clean and healthy for fish and people. And now I’m big enough to help    3    the river too. Picking up rubbish is    4   a treasure hunt (搜寻). My friends and I find plastic bags, bottles, paper, and all kinds of things. There used to be even more rubbish here. On one weekend, my grandparents    5   picked up 6 tons of rubbish. That’s as much as an elephant weighs! That rubbish was   6  to the river or the animals and plants that lived there. So the River Rats taught people who were playing around the river to take rubbish with them rather than   7    it. Now there’s much less rubbish for   8    to pick up. Maybe one day we won’t find any rubbish here. My favorite job is to look for water bugs (虫子)! The bugs like to stay at the river bottom. Some bugs don’t   9    how dirty the water is, but other bugs can only live in clean water.   10    we find lots of bugs that need clean water, then we will know the river is clean enough for fish and for us. I love taking care of the Jacks Fork River. We help make sure it’s a clean, safe place for me and my friends to play. (    ) 1. A. state             B. club          C. block              D. river (    ) 2. A. goal         B. opinion     C. name               D. position (    ) 3. A. take care of B. run out of C. get out of       D. be in control of (    ) 4. A. for      B. like               C. with               D. from (    ) 5. A. only    B. once       C. also               D. still (    ) 6. A. reusable B. unusual   C. harmful          D. difficult (    ) 7. A. passing B. collecting      C. providing       D. throwing (    ) 8. A. them   B. us                C. you             D. it (    ) 9. A. mind   B. check     C. regret            D. regard (    )10. A. Though B. Because       C. If               D. But 三、阅读理解。 We all want to protect our planet, but we’re mostly too busy or too lazy to bring about big changes that will improve our lifestyle and save the environment. Here are some tips you can take to improve our environment. Use compact fluorescent light bulbs (节能灯)．It is true that these bulbs are more expensive, but they last much longer and they can save energy and in the long term your electricity bill would be reduced（减少）. Donate. You have lots of clothes or things you want to throw away. If they are still usable, give them to someone who needs them. You may also choose to give them to associations (协会)． Turn off your devices.When you do not use a house device, turn it off. For example, If you don't watch TV, turn it off. Turn off the light when you leave a room.It's an easy habit to take up which will help you save a lot of money. Walk or cycle. Driving is one of the biggest causes of pollution. If you want to use your car, ask yourself the following question：Do I really need my car？Walk or use your bike if the journey is a short one. ( )1.What does the author think of compact fluorescent light bulbs? A. They are too expensive for many families. B. They can save energy but they can’t last long. C. They are expensive but they are brighter than the usual lights. D. They are expensive, though, in fact, they are cheaper than the usual lights. ( )2.If you don't like some of your clothes because of their style, what should you do with them? A. Throw them away. B. Keep them in the closet. C. Give them to someone who may need them. D. Clean the floor with them. ( )3.In which part does the writer tell us to reduce pollution? A. Use compact fluorescent light bulbs. B. Donate. C. Turn off your devices. D. Walk or cycle. ( )4.What's the best title for this passage? A. How to Save Money B. Four Ways to Protect the Environment C.We Are Too Busy to Change the Environment D. What Makes the Biggest Pollution? 四、阅读还原。 All animals produce waste. We call it “waste”, but we all know it can be very useful. Farmers have long used animal and human waste as a fertilizer (肥料). In some parts of the world, animal waste or poop, is collected, dried and burned for cooking and heating. 1 The Chengdu Research Base of Giant Panda Breeding has an unusual way of using animal waste. The pandas in it produce a lot of poop a day. 2 It’s not strange. After all, paper is made from plant fiber (植物纤维), which cannot be digested (消化) and simply goes through the body as waste. Since pandas eat nothing but bamboo, their waste is perfect paper material. 3 Their stomachs haven’t fully developed for their vegetarian diet, so their bodies make use of just 20% of what they eat. The other 80% comes out as poop: very high in fiber and perfect for paper. After the poop is collected, it is cleaned, crushed and poured into frames to dry. 4 No one can guess where the paper comes from. And because of its good quality (质量) as well as the worldwide popularity of the panda, gift products made from the paper sell well. 5 They got the idea from the elephant dung paper (由大象粪便做的纸) made at the Elephant Conservation Center in Chiang Mai, Thailand. And Creative Paper Wales in the UK sells paper gifts made from sheep waste. A .What’s more, pandas have a special advantage. B．After this process, it becomes really good, strong paper. C．But have you ever heard of paper that’s made from poop? D．However, the Chinese aren’t the first to make paper from animal waste. E．This material is being turned into a new product called Panda Poop Paper. 五、语法填空。 There are many ways to save the environment if you would like. In this passage, you can find some ways. Plant more trees. Choose a right 1 near your house or workplace. 2 there’s any rule stopping you growing trees in that area, go ahead and grow trees. Plant a tree every month and 3 your friends and classmates to join you. Have more and more trees 4 and there will be a day when you have green land thanks to your hard work. Walk more and drive less. Choose to walk 5 of driving your car. Walk or ride a bicycle to work if it’s not very far. Not only cycling but walking is good exercise. And each time you avoid using your car, you’re doing something meaningful to cut 6 air pollution. You are saving fuel, saving money and keeping fit as well. Save water. Water is very important for living things. It’s 7 who use and pollute it. The simplest way to save water is turning 8 water taps（水龙头）after use. When you visit a beach, make sure that you don’t throw waste around. Do not pollute rivers 9 dropping garbage or other waste. Water is so valuable, so we 10 waste or pollute it. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 巴中龙泉外国语学校英语学科课时作业 参考答案 Unit 13 We’re trying to save the earth! 第一课时Section A（1a ~ 2d） 一、根据句意和汉语提示写出所缺的单词。 1. garbage 2. bottom 3. fishermen 4. ugly 5. advantage 6. plastic 二、单项选择题。 1. B. cost 2. D. knowledge 3. C. instead of 4. B. afford 5. C. cut down 6. A. at the bottom of 三、完形填空。 1. B. save 2. D. serious 3. A. factories 4. C. changes into 5. B. something 6. C. Why 7. C. health 8. D. from 9. A. less 10. D. before 四、阅读理解。 1. B. a proposal 2. C. to save water 3. B. use both sides of paper 4. C. Use a paper cup when brushing your teeth. 5. A. Protect the Earth 五、阅读还原。 1. The island is completely made of sand 2. Planes arrive and leave from here 3. D. Many kinds of birds and animal live in the forest 4. Unluckily, visitors have caused many problems 5. So it is time to protect the environment of the island **第二课时Section A（3a ~ 4c）** 一、根据句意及所给汉语提示，用恰当的短语填空。 1. took part in 2. pay for 3. took action 4. on the food chain 5. cut off 二、完形填空。 1. C. very little 2. D. become 3. D. because of 4. D. millions of 5. B. bigger 6. A. used 7. B. find out 8. B. cut 9. A. also 10. C. built 三、阅读理解。 1. C. Pieces of space junk 2. D. It may crash into other space tools causing damage or death 3. B. the tools don't become space junk 4. B. Use robots to collect it. 5. A. Environment. 四、阅读还原。 1. E. It’s supposed to be good for relaxation and keeping fit. 2. B. On the way home, though, it started raining and I got very wet. 3. A. She also went to the chemist’s and got me some vitamin pills. 4. D. I didn’t think it was very funny, but he did! 5. C. When I was going home, I fell off the bike and hurt my leg. 五、短文填空。 1. protecting 2. pollution 3. nature 4. harm 5. best 6. it 7. world 8. duty 9. because 10. us **第三课时Section B（1a ~ 2e）** 一、单项选择题。 1. A. reused 2. B. an 3. D. change 三、阅读理解。 1. C. the recycling process B 1. A. It experienced larger amounts of smog. 2. B. By setting off firecrackers. 3. D. More than ten. 4. D. More Chinese think the celebration of setting off firecracker is fashionable. 5. B. How to improve the air quality 四、阅读填空。 1. alone 2. air pollution 3. was set up 4. London 5. worse **第四课时Section B（3a ~ self check）** 一、根据句意及所给汉语提示，写出句中所缺单词的正确形式。 1. gate 2. bottle 3. metal 4. afford 5. works 二、完形填空。 1. B. club 2. C. name 3. A. take care of 4. B. like 5. A. only 6. C. harmful 7. D. throwing 8. B. us 9. A. mind 10. C. If 三、阅读理解。 1. C. They are expensive, though, in fact, they are cheaper than the usual lights. 2. C. Give them to someone who may need them. 3. D. Walk or cycle. 4. B. Four Ways to Protect the Environment 四、阅读还原。 1. C. But have you ever heard of paper that’s made from poop? 2. E. This material is being turned into a new product called Panda Poop Paper. 3. A. What’s more, pandas have a special advantage. 4. B. After this process, it becomes really good, strong paper. 5. D. However, the Chinese aren’t the first to make paper from animal waste. 五、语法填空。 1. place 2. if 3. encourage 4. grow 5. instead 6. down 7. we 8. off 9. by 10. mustn't 1 学科网（北京）股份有限公司 $$