59. Why didn't you tell me there was no meeting today? I _______ all the way here through the heavy snow.

　　 A. needn't have driven　　 B. can' t have driven　　　　

C. mustn't have driven　　 D. shouldn't have driven

58.--I wonder if I ______ smoke here.

　　 --No, you __. Could you see the sign "NO SMOKING" there?

　　 A. can; needn't　　 B. shall ; won ' t　 C. must; can' t　 　D. may; mustn't

57. -- ______ I speak to Diana, please?

　　 --I'm sorry she __ come to the phone because she's washing her hair.

　　 A. Might; won' t　　 B. Can ;mustn't　　 C. May; can' t　　 D. Could; wouldn't

56.--How about going at four this afternoon?

　　 --OK, that __ be a good time for me. Where shall we meet?

　　 A. would　　　　 B. could　　　　 C. might　　　　　 　D. should

55.--No one was prepared for Professor Hill's question.

　 --I guess we __ the lesson last night.

　　 A. could read　　 B. ought to read　　 C. read　　　 D. should have read

54. His appearance has changed so much that you __ well not recognize him.

　　 A. may　　　 B. can　　　　 C. must　　　　 D. should

53. Under more favorable conditions, we __ better.

　　 A. could have done　 B. need have done　 C. should do　 D. might be doing

52.--I hear you have written a book.

　　 --Yes, the book __ be out in a month or so.

　　 A. can　　　 B. dare　　　　　 C. should　　　　　 D. need

51.--Is there a flight to London this evening?

　　 --There 　___ be. I'll phone the airport and find it out.

　　 A. must　　　 B. would　　　　 C. might　　　　　 D. can

50. The line was busy; someone __ the telephone.

　　 A. may have used　 B. may be using　 C. must have been using　 D. must be using