31. The boy insisted that he　　　 the money and he　　　 at once.

A. not steal; be set free　　　　　　　　 　　 B. hadn't stolen; be set free

C. didn't steal; should be set free　　　　 　　 D. hadn't stolen; set free

30. With more forests being destroyed, huge quantities of good earth _____ each year.

A. is washing away　　　　　　　　　　　　　 B. is being washed away

C. are washing away　　　　　　　　　　　　 D. are being washed away

29. -Would you like to join us in playing the game?

-I’m sorry, but my homework ______ by now.

A. hasn’t finished　　　 B. hasn’t been finished　 C. isn’t finished　　　　 D. won’t be finished

28. Great as Newton was, many of his ideas _____today and are being modified by the work of scientists of our time.　

A. are to challenge　　　 B. may be challenged　　 C. have been challenged　　 D. are challenged

27.-What were you doing when Tony phoned you?

　 -I had just finished my work and ___ to take a shower.

A. had started　　　　 　B. started　　　　　 　 C. have started　　 　　 D. was starting

26.-You were out when I dropped in at your house.

-Oh, I_______ for a friend from England at the airport.

A. was waiting　 　　 B. had waited　　 　　　 C. am waiting　　 　D. have waited

25. -Do you think we should accept that offer?

-Yes，we should，for we______ such bad luck up till now，and time______ out.

A. have had；is running　　 B. had；is running　 C. have；has been run　 D. have had；has been run

24. ____ in the regulations that you should not tell other people the password of your e-mail account.

A. What is required　　　　 B. What requires　　　　 C. It is required　　　 D. It requires that

23.-Hi, Nancy, I 　　　　you had come back. So have you graduated from college?

　 -Yes. I_______ French for four years in Nanjing.

A. don’t know,have studied　　　　　 B.didn’t know, had studied　

C. didn’t know,studied　　　　　　　 D.don’t know, am studying

22.-I’m sorry, I shouldn’t have been so rude to you.

　 -You________ your temper but that’s OK.

A. have lost　　　 B. had lost　　　　　　 　C. did lose　　　　　　 D. were losing