| 1. 难度：中等 | |
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The world's economic development is not a win-lose game but one in which all ________ be winners. A. can B. shall C. must D. would
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| 2. 难度：中等 | |
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–Who is the girl standing over there? --Well, if you ____ know, her name is Mabel. A. may B. can C. must D. shall
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| 3. 难度：中等 | |
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Lisa hasn’t lived here for long. She ____ know many people. A. needn’t B. can’t C. shouldn’t D. didn’t
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| 4. 难度：中等 | |
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He paid for a seat, when he ______ have entered free. A. could B. would C. must D. need
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| 5. 难度：中等 | |
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Children under 12 years of age in that country ________ be under adult supervision when in a public library. A. must B. may C. can D. need
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| 6. 难度：中等 | |
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My MP4 player isn't in my bag. Where ________ I have put it? A. can B. must C. should D. would
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| 7. 难度：中等 | |
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Liza ___ well not want to go on the trip --- she hates traveling. A. will B. can C. must D. may
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| 8. 难度：中等 | |
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You ______ see the doctor, Joe. You don’t look very well. A. must B. shall C. may D. can
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| 9. 难度：中等 | |
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My father ______ have a large farm and he liked it very much. A. would B. used to C. could D. ought to
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| 10. 难度：中等 | |
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Excuse me, six, Mr. White has arrived. he wait outside or just come in ? A. Shall B. May C. Could D. Must
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| 11. 难度：中等 | |
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Jack’s ill, so they ______ change their plans. A. must B. should C. have got to D. ought to
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| 12. 难度：中等 | |
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– Lucy doesn’t mind lending you her dictionary. -- She ______ . I've already borrowed one. A. can't B. mustn't C. needn't D. shouldn't
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| 13. 难度：中等 | |
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Since you have come so far with your experiment，you carry it through to the end. A. may B. might C. may well D. may as well
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| 14. 难度：中等 | |
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— Finally I got to my grandmother’s home on foot. — Really? You _______ a ride there. A. must have taken B. could have taken C. shouldn’t have taken D. couldn’t have taken
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| 15. 难度：中等 | |
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She suffered a mental disease for quite some time and in the end she _____ go into a mental hospital. A. had to B. must C. would like to D. could
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| 16. 难度：中等 | |
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—Where is my cell phone? I can find it nowhere. —You it stolen while on the bus. A. must have B. should have had C. may have had D. can have
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| 17. 难度：中等 | |
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---Catherine, I have cleaned the room for you. ---Thanks. You_____ it. I could manage it myself. A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done
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| 18. 难度：中等 | |
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Our teacher demanded our report ________ before five. A. must be handed in B. be handed in C. should hand in D. need be handed in
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| 19. 难度：中等 | |
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Harry has been reading all day —he ______ be tired. A. should B. has got to C. has to D. must
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| 20. 难度：中等 | |
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Service was included in the bill, so you ______ the waiter. It was a waste of money. A. will not tip B. may not tip C. needn’t have tipped D. must not tip
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