39. We need to practice speaking English more often, ___________ we?

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

37. We mustn’t be late, __________ we?

　 A. must　　 B. may　　 C. are　　　 D. A&B

38, I needn’t show her the keys to the question, ________ I?

　 A. must　　 B. need　　 C. can　　 D. do

36. She must have arrived there yesterday, __________ she ?

　 A. didn’t　　 B. hasn’t　　 C. needn’t　 D. mustn’t

35. You must have studied English for many years, _________ you?

　 A. didn’t　 B. haven’t　　 C. needn’t　　 D. mustn’t

34. We must start earlier,__________ we?

　 A. needn’t　　 B. mustn’t　　 C. don’t　　 D. mustn’t

33. ---------- You must do as I tell you.

----------Oh, I must, ____________I?

　A. should　 B. mustn’t　　 C. ought　　 D. must

32. Lovely weather! ___________?

　A. Yes. You are right.　 B. Yes ,isn’t it　 C. No, it is　 D. No, you are wrong

31. He ought to go by plane, _____he ?

　 A. shouldn’t　　 B. wouldn’t　　 C. should　 D. would

30. They used to live in these mountain areas ,_____________ they?

　 A. did　　 B. didn’t　　　　 C. used　　　 D. weren’t

29. She is going to see you ,_________ she ?

　 A. isn’t　　 B. is　　　　　 C. don’t　　 D. doesn’t