15．It was my mother ________ put forward a good solution to the problem.

　　16．How I wish I ________ (can) make up for the lost time.

　　17．We found ourselves ________ (cycle) through clouds.

　　18．He was about to close the window ________ a beautiful flower caught his eye.

　　19．Ever since 1990, the Greens ________ (live) a peaceful life in this village.

　　20．She insisted we ________ (keep) pace with society.

　　答案

　　1．disadvantages　2.graduated　3.preference

　　4．determined　5.organizing　6.bent　7.Finally

　　8．reliable　9.shortcomings　10.properly　11.of

　　12．to/towards　13.Dressed　14.in　15.that/who

　　16．could　17.cycling　18.when　19.have lived

　　20．(should) keep

　　Ⅲ.单句改错

　　1．The scientist prefers going to work on foot every day to drive his car.________

　　2．To her great pleasure, it will be less than one year when her son graduates from Beijing University.________

　　3．Once seeing, it is difficult to forget.________

　　4．I don't care the price, so long as the car is in good condition.________

　　5．The mother insisted that he finished his homework first, which made his son very angry.________

　　6．That you will succeed in doing the work depends on your attitude to it.________

　　答案

　　1．drive改为driving　2.when改为before

　　3．seeing改为seen　4.care后加about

　　5．finished改为finish　6.That改为Whether

　　Ⅳ.语法填空

　　Are you facing a situation that looks impossible to fix?

　　In 1969，the pollution was terrible along the Cuyahoga River near Cleveland, Ohio. It __1__ (be)unimaginable that it could ever be cleaned up. The river was so polluted that it __2__ (actual) caught fire and burned. Now, years later, this river is one of __3__ most outstanding examples of environmental cleanup.

But the river wasn't changed in a few days __4__ even a few months. It took years of work __5__ (reduce) the industrial pollution and clean the water. Finally, that hard work paid off and now the water in the river is __6__ (clean) than ever.