11. In recent years many football clubs _____ as business to make a profit.

　　A. have run B. have been run C. had been run D. will run

　　【答案】B。本题考查的是动词的时态和语态。In recent years是现在完成时的标志。而且动词run(经营管理)，和足球俱乐部之间是被动关系。因此选择B。最近几年很多足球俱乐部作为盈利机构被开办起来。

　　12. Since he left the university, he _____ in an accounting company.

　　A. has been working B. had worked

　　C. had been working D. was working

　　【答案】A这句话的意思是自从大学毕业以后，他就在这家会计公司工作。该句是since引导的时间状语从句。由于该动作一直持续到现在，所以用完成时的进行时态。这句话强调的是自从大学毕业以后他就一直在哪家公司工作.

　　13. Until yesterday, Miller’s family _____from him for six months.

　　A. hasn’t heard B. hasn’t been hearing C. hadn’t heard D. didn’t bear

　　【答案】C。直到昨天，米勒家6个月没有收到他的消息了。时间段标志词“for six month”,因此选择完成时。

　　14. The chemistry class ___ for five minutes when we hurried there.

　　A. had been on B. was on C. has been on D. would be on

　　【答案】A for five minutes是延续性时间状语，句子时态应用完成时; when 引导的时间状语从句为过去式，主句时态应与之对应，所以应该用过去完成时。

　　15. All the apparatus______ before the experiment began.

　　A. have been tested B. had been tested C. were tested D. had tested

　　【答案】B。所有的设备都在实验开始前被测试过了。“test”是在过去的某个时间(began)之前发生的，即过去的过去，因此选择完成时。

　　16. I ___ writing the article by the time you get back.

　　A. shall finish B. must have finished C. have finished D. shall have finished

　　【答案】：D。本句为将来完成时。表示在将来的某一时刻或将来的某一时刻之前已完成，这一动作可以继续下去。When you come again in July we shall have moved into a new house.七月份你们再来的时候，我们就搬进新房子里去了。I shall have done it by the end of this week.我要在周末做完它。本句的意思是“我要在你回来之前写完这篇文章”。

　　17. Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

　　A. will teach B. would have taught C. has been teaching D. will have been teaching

　　【答案】D此题考查的是动词辨析。A 建议，但无suggest sb to do 这种用法;B 吸引;C 引诱，D劝说。根据题意应该是：Alice很相信你，只有你能劝说她放弃这种愚蠢的念头。故选D

　　18. In another year or so, you _____ all about it.

　　A. forget B. would forget C. have forgotten D. will have forgotten

　　【答案】D大概一年以后，你就会完全忘记它了。将来完成时。

　　19. By this summer, Elizabeth ______ here for ten years.

　　A. will work B. works C. will have worked D. has worked

　　【答案】C。到今年夏天为止，伊丽莎白就在这里工作十年了。标志词“By this summer”到将来的某个时间为止，所以用将来完成时。

　　20. You needn't hurry her. She ___ it by the time you are ready.

　　A. will have been finishing B. would finish C. will have finished D. will be finishing

　　【答案】C。你没必要催她。你准备好了的时候，她就会做完了。标志词“by the time”。