课时提升作业(十四)

　　必修3　Unit 4

　　Ⅰ. 单项填空

　　1. (2017·广安模拟)Measures must be taken to prevent pollution　happily.

　　A. from we live　B. for us to live

　　C. us living

　　D. from our living

　　2. She has been　over his strange letter for several weeks, but she still figures out nothing about it.

　　A. puzzling　B. worried　C. troubled　D. anxious

　　3. (2017·巢湖模拟)Our football team will compete against the American team this evening. Let’s go and　them　, shall we?

　　A. cheer; up B. join; up

　　C. add; up

　　D. pick; up

　　4. (2017·北京模拟)　you are familiar with the author’s ideas, try reading all the sections as quickly as possible.

　　A. Now that B. Ever since

　　C. In case

　　D. As long as

　　5. (2017·邯郸模拟)The plan　just because people were unwilling to cooperate.

　　A. put down B. pulled down

　　C. turned down

　　D. broke down

　　6. (2017·上海模拟)Smokers who regularly drink are nearly　to suffer from lung cancer as smokers who don’t drink, according to a new study in Cancer Research.

　　A. twice likely as B. twice as likely

　　C. as twice likely

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