68. I got up early this morning, but I _______so because I had no work to do.

A. mustn't have done 　　　　　　　　　　　　 B. didn't need to do

C. needn't have done 　　　　　　　　　　　　 D. can't have done

67. You must have seen him last night, _______?

A. haven't you 　　　 B. didn't you 　　　　 C. don't you 　　　　 D. must you

66. You must be a writer, ______?

A. mustn't you 　　　 B. are you 　　　　　　 C. must you 　　　　 D. aren't you

65. “_______ he be watching TV now?”

"Yes, he _______ be watching TV now."

"No, he _______ be watching TV now."

A. Must, can, mustn't 　　　　　　　　　　　　 B. Can, must, can't

C. Can, can, mustn't 　　　　　　　　　　　　　 D. May, must, needn't

64. She is already two hours late. What _______ o her?

A. can have happened 　　　　　　　　　　　 B. may have happened

C. should have happened 　　　　　　　　　 D. must happen

63. I think Helen is at home.

No, she _______ be at home, for she phoned me from the airport just five minutes ago.

A. mustn't 　　　　　　 B. needn't 　　　　　　 C. can't 　　　　　　　　 D. dared not

62. Where is Mary?　　　　　　　 She isn't here.　 I think she_____.

A. may have gone home 　　　　　　　　　　 B. must have gone home

C. might have gone home 　　　　　　　　　 D. All the above

61. If you really want yourself to be in good health, you must _______ always _______ so much.

A. not, be smoking 　　　　　　　　　　　　　 B. not, have smoked

C. not, to smoke 　　　　　　　　　　　　　　　 D. be not, smoking

60. One ought _______ for what one has done.

A. not to be punished 　　　　　　　　　　　　 B. to not be punished

C. to not punished 　　　　　　　　　　　　　　　　　 D. not be punished

59. The young man has made so much noise that he _______ not have been allowed to attend the concert.

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