33. I have some trouble _______ physics. I would be grateful _______ you if you could give me some advice on it.　　　

　 A. with; for　　　　 B. in; to　　　　　 C. in with　　　　 D. with; to

32. In our school library there _________ a number of books on science and the number of them _______growing larger and larger.　　

　 　A. is; are　　　　　 B. are; is　　　　　 C. has; is　　　　　 D. have; are

31. The reason ______he was late for school was ______ he had to send his mother to a hospital.

　 　A. that; why　　　 B. why; because　　　　 C. why; that　　 D. that; because

30. While _______ the dog, you should take care not to ________. Otherwise, it may be dangerous to strangers.　　　　　　　　

　 A. walking; let it loose　　　　　　　　 B. walk; be loose

　 C. walking for; get it loose　　　　　　 D. training; get it run

29. It was about 600 years ago _______ the first clock with a face and an hour hand was made. 　

　　A. that　　　　　 B. until　　　　　　　 C. before　　　 D. when　　

28. This is Mr. White, ______I think has something interesting to tell you.　　

A. which　　　　 B. whom　　　 C. that　　　　 D. who

27. -------Taxi! Are you free?　　

　--------Sure.______.

　 --------Hotel Milton at 52 Washington Avenue.

A. Where to, sir?　　　　　　　　　　 B. Where are you from, sir?　　

C. You should take the NO.3 bus　　　　 D. I know the place very well

26. He _______be in his office now, because he phoned me from his home just now.　

A. mustn’t　　 B. needn’t　 　　C. can’t　　　 D. shouldn’t

25. Mr. Black _______ Shanghai in a few days. Do you know when the earliest plane _______ on Sunday? 　

A. leaves; takes off　　　　　　　 　　　　　B. is leaving; takes off

C. is leaving; is taking off　　　　 　　　　　D. leaves; is taking off　

24. Our English teacher requested that the homework _______ tomorrow morning.　

A. would be handed in　　 B. be handed in 　　C. hand in　　　 D. must be handed in