33、(浙江卷)16. My friend, who ______ on the International Olympic Committee all his life, is retiring next month.

　 A. served　　　 B. is serving　　　　　　　　　 C. had served　　　　　　　　　 D. has served

32、(浙江卷)7. The company had about 20 notebook computers but only one-third _______ used regularly. Now we have 60 working all day long.　 (+主谓一致)

　 A. is　　　　　　 B. are　　　　　　　　　　　 C. was　　　　　　　　　　　　　 D. were

31、(浙江卷)6. This machine _______. It hasn’t worked for years.

　 A. didn’t work　 B. wasn’t working　　　　 C. doesn’t work　　　　　　　 D. isn’t working

30、(广东卷)33. So difficult 　　　　　　it to work out the problem that I decided to ask Tom for advice.(+倒装)

　　 A. I did find　　　 B. did I find　　　　 C. I have found　 　　D. have I found

29、(广东卷)32. The young girl sitting next to me on the plane was very nervous. She_________ before.

　　 A. hasn't flown　　 B. didn't fly　　　　 C. hadn't flown　　　　 D. wasn't flying

28、(江苏卷)27. Although medical science __________ control over several dangerous diseases, what worries us is that some of them are returning.

　 A. achieved　 B. has achieved　　　　　　　　 C. will achieve　　　　　　　　 D. had achieved

27、(江苏卷)23. --- I don’t suppose the police know who did it.

　　　　　　　 --- Well, surprisingly they do. A man has been arrested and ________ now.

　 A. has been questioned　 B. is being questioned　 C. is questioning　　　　　 D. has questioned

26、(湖南卷)35.In a room above the store, where a party __________, some workers were busily setting the table.

A. was to be held　　 B. has been held　　　 C. will be held　　　　 D. is being held

25、(湖南卷)24.I was giving a talk to a large group of people, the same talk I ________to half a dozen other groups.

A. was giving　　　　 B. am giving　　 　C. had given　　　　 D. have given

24、(湖北卷)32. I won't tell the student the answer to the math problem until he ____on it for more than an hour.

　 A. has been working　　　　　　 B. will have worked

　 C. will have been working　　　　 D. had worked