You _____ pay too much attention to your reading skill, as it is so important.
A. cannot B. should C. must D. needn’t
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
