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　　情态动词与主谓一致练习
　　[情态动词练习]
　　I. 单项填空。（10分钟）
　　从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
　　1. --- _____ I go out to play now, Mum?
　　--- No, you _____. You should do your homework first.
　　A. Must; mustn’t           B. Must; wouldn’t
　　C. May; needn’t            D. May; had better not
　　2. _____ you like to have a wals this evening?
　　A. Did     B. Would       C. Should        D. Can
　　3. You _____ be careful when you cross here --- the traffic lights aren’t working.
　　A. could    B. might        C. ought to       D. may
　　4. We were all waiting for you; you _____ for the seaside by yourself without leaving a message.
　　A. mustn’t leave            B. needn’t leave
　　C. shouldn’t have left        D. couldn’t have left
　　5. It _____ be she that told him about it; it _____ be you, because only you and I know it.
　　A. mustn’t; must          B. couldn’t; must
　　C. mustn’t; might           D. couldn’t; might
　　6. A hardworking man _____ become a great scientist, but a great scientist _____ be a hardworking man.
　　A. can’t; can             B. may not; can
　　C. can’t; must              D. may not; must
　　7. You _____ go right now if you want, but I thin _____, because we have enough time.
　　A. must; may not           B. must; can’t
　　C. may; needn’t            D. may; mustn’t
　　8. --- Why do you ask me to do the difficult work?
　　--- Because you _____ do such a thing and nobody else is fit for it.
　　A. would      B. can      C. should        D. may
　　9. You _____ be tired; you have been working for so long a time, but he _____ be tired; he has just begun to work.
　　A. may not; must           B. must; may not
　　C. can’t; must              D. must; can’t
　　10. It’s said that there are plenty of hotels in that town. There _____ be any difficulty for you to find somewhere to stay.
　　A. wouldn’t                B. mustn’t
　　C. shouldn’t                D. needn’t