31. The father made a promise _________ his daughter worked hard, he would take her to visit Huangshan.

A. if　　 　　　　　 B. that　　　　　　 　 C. whether　　　　　 D. that if

30. ______ is no possibility ______ Bob can win the first prize in the match.

A. There; that　　 　 B. It; that　 　　　　　　　　 C. There; whether　 　　 D. It; whether

29. Now many a college student ______ to the West in search of work.

A. has gone　 　　　　 B. have done　 　　　　　　 C. had gone　 　　　　　　 D. go

28. 　______ by a greater demand of vegetables, farmers have built more green houses.

　　　 A. Driven　　 　　　　　　　 　B. Being driven　　 C. to drive　　　 　　　　　 D. Having driven

27. I have to go to work by taxi because my car ____________ at the garage.

　　　 A. will be repaired　 B. is repaired　　　 C. is being repaired　　 D. has been repaired

26. ---The woman biologist had stayed in Africa studying wild animals for 13 years before she returned.

　 ---Oh, dear! She ____________ a lot of difficulties.

A. may go through　　　　　　　　　 　　 　　　 B. might go through

C. ought to have gone through　　　　 　　　　　　 D. must have gone through

25. Although most of them have no doubt ______ he will win the match, I still wonder ______ he has been well prepared.

A. if; that　　　 　　　　　　　 B. that; whether　　　 　 C. that; that　　　　 D. whether; if　　　　　　　　　　

24. I will never forget the beautiful place _______ I spent my childhood with my grandparents.　 　　

A. that　　　　　 　 B. where　　　 　　　　　　 C. because　　　　 D. in which　

23. Great changes have taken place in that school. It is no longer_____ it was 20 years ago, ______ it was poorly equipped.

A. what; when　　 　 B. that; which　 　　　　　 C. what; which　 D. which; that

22. Having checked the windows were closed, and _______ all the doors were closed, the boy opened the door to his bedroom.

A. why　 　　　　　　　 　　　 B. when　　 　　　　　　　　 C. that　 　　　　　　 D. where