Unit 13 We're trying to save the earth 练习 一、词汇运用 （一）根据汉语提示或首字母写单词 We should stop using_____(塑料的) bags to protect the environment. The_____(鲨鱼) is one of the most dangerous animals in the ocean. We should_____(减少) the waste we produce every day. The government is trying to solve the_____(污染) problem. Many people like to eat_____(鱼翅), but it's cruel to sharks. The_____(工业) in this area has developed very fast in recent years. We should_____(回收利用) waste paper and bottles to save resources. The_____(法律) must be obeyed by everyone. The_____(科学上的) research shows that air pollution is harmful to our health. We should_____(承担得起) to buy an energy - saving car to protect the environment. （二）用所给单词的适当形式填空 Look! The students_____(collect) waste paper in the classroom. We_____(plant) many trees in our school in the past few years. The factory_____(produce) a lot of waste water every day. It's bad for the environment. We should stop_____(use) plastic products to protect the earth. The government has made some_____(law) to protect the wild animals. The_____(science) is doing an experiment to find a way to solve the pollution problem. We should raise people's_____(aware) of environmental protection. The river_____(pollute) seriously. We need to clean it up. The_____(fish) in this river are getting fewer and fewer because of the pollution. We should encourage people_____(recycle) waste materials. 二、语法巩固 （一）单项选择 We_____ to save the earth. A. are trying B. try C. tried D. will try They_____ many trees in the park since last year. A. plant B. planted C. have planted D. are planting The factory_____ waste water into the river. It's against the law. A. pours B. poured C. is pouring D. has poured We should stop_____ plastic bags. A. use B. using C. to use D. used The government_____ some laws to protect the environment. A. makes B. made C. has made D. is making Look! The students_____ an activity to clean up the park. A. have B. had C. are having D. have had We_____ to turn off the lights when we leave the room. A. should B. ought C. can D. may The air_____ seriously. We must do something to stop it. A. pollutes B. is polluted C. polluted D. was polluted They_____ the importance of environmental protection. A. realize B. realized C. have realized D. are realizing We should encourage people_____ more trees. A. plant B. to plant C. planting D. planted （二）句型转换 We are trying to save the earth.（改为一般疑问句） _____ you_____ to save the earth They have planted many trees in the park.（对划线部分提问） _____ have they_____ in the park The factory pours waste water into the river.（改为否定句） The factory_____ _____ waste water into the river. We should stop using plastic bags.（改为同义句） We should_____ _____ using plastic bags. The government has made some laws to protect the environment.（改为被动语态） Some laws_____ _____ _____ by the government to protect the environment. They are ... ...
