I _____ have written to him because he phoned me shortly afterwards.

A. ought to      B. must      C. couldn’t      D. needn’t

 Sir, you ______ be sitting in this waiting room. It is for women and children only.

A. oughtn’t to   B. can’t   C. won’t D. needn’t

 He hurt his leg climbing the mountain; otherwise, he _____ the meeting.

A. will attend      B. had attended      C. would have attended     D. would attend

 My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture.

A. couldn’t have attended          B. needn’t have attended

C. mustn’t have attended               D. shouldn’t have attended

 —How is that, Joan?

—Yeah, it’s from the boss. She _________ first, whether she likes it.

A. shall go       B. ought to have gone       C. should go       D. must have gone

 _______ fired, your health care and other benefits will not be immediately cut off.

A.  Would you be   B. Should you be   C. Could you be     D. Might you be

 — Turn off the TV, Jack. ____ your homework now?

— Mum, just ten more minutes, please.

A. Should you be doing                B. Shouldn’t you be doing

C. Couldn’t you be doing               D. Will you be doing

 —Who is the girl standing over there?

— Well, if you _____ know, her name is Mabel.

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

 —They haven’t finished the work up to now.

—Well, they________.

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

 It is not like Jack to be unfriendly, so he _________ you when you called.

A. can’t have seen                 B. should not have seen

C. must not have seen               D. need not have seen