79. We have been away for twenty years. You __ imagine how delighted we were when meeting again.

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

78. But she __ never do it, you know, it was useless even to demand it of her.

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

77. I' m listening hard but I __ hear what he is saying.

　 A. maynot　　　　 B. can' t　　　 C. won't　　　　　　 D. shouldn't

76.--Would you come back late next time.`?

　　 --No, I __

　　 A. shan't　　　 B. won' t　　　　 C. wouldn't　　　　　 D. mustn't

75.--I came here by taxi and the driver charged me 40 yuan.

　　 --Really? You __ by bus.

　　 A. could have come　 B. can have come　 C. must have come　 D. may have come

74. The driver has drunk too much wine and dangerous things __ happen to him at any time.

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

73. You __ be careful when you cross here--the traffic lights aren't working.

　　 A. could　　　 B. might　　　　 C. ought to　　　　　 D. may

72.--Shall I tell Ann the test results?

　　 --No, you __. She' s already got the score report.

　　 A. wouldn't　　 　　　B. needn't　　　 C. mustn't　　　　　 D. shouldn't

71. The thief ______in from the kitchen window as all the other windows and door were closed.

　　 A. may climb　　　　　　 B. must have climbed　　　　

C. could have climbed　　　 D. should have climbed

70.There was a lot of fun at yesterday's party. You __ come, but why didn't you?

　　 A. must have　　　 B. should　　　 C. need have　　　 D. ought to have