31. A computer ________ think for itself; it ________ be told what to do.

　A. may not, must　　　　 B. mustn't, might　　　　　　　 C. shouldn't, could　　　　 D. can't, must

30. He ________ eating American food since he came here.

　 A. used to　　　 B. has been used　　　　 C. has been used to　　　　 D. was used to

29. Do you think if he dares _________ in public.

　 A. speak　　　　 B. speaking　　　　　　 C. to speak　　　　 D. spoken

28. Did he need ________ then?

　 A. leave　　 　　　　　 B. to leave　　 　　　 C. leaving　　 　　　 D. left

27. ________ you succeed !

　 A. Can　　 　　　　　　 B. May　 　　　　　　 　C. Must　　 　　　　 D. Will

26. ------"Would you like to go out for a walk?"　　　　　　　　

　 ------"Yes, ___________. "

　 A. I'd like to　　　　 B. I'd like　　　　　　　　　 C. I'll like to　　　　　 D. I would

25. ------"You ought to have come here ten minutes ago?"　　　　　　　　

　 --------"Yes, I _________. "

　　 A. ought to　　　　 B. ought to have　　　　　　　 C. ought　 　　　　D. have ought to

24. M:________?

　 T:I'd love to, but I'm afraid I have no time."

　 M:0h, no. You'll surely come over.

　 T: It's very nice of you. But I'm sorry I have to go to a meeting.

　 A. Do you have lunch out in a restaurant　　　　　　　 B. Shall I have you with me at my birthday

　 C. Did you go to see the film　　　　　　　　　　　 D. Have you enjoyed yourself at the party

23. -----"Would you tell me something about the affair?"　　　　　　　　

　 ------“__________”.

　　 A. Yes .please　　　　 B. All right　　　 　　　 C. Not at all　　　　　 D. I do

22. ------"Would you mind if I open the window?"　　　　　　　　　

　 -------“__________”.

　 A. I don't like it　　　　 B. Yes .please　　　　　　　　 C. No, please　　　　 D. No. I'm sorry