问题
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【C17】A.must have beenB.may have beenC.could have beenD.should have been
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He must have had an accident, or he _____ thenA:would have been hereB:would be hereC:s
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I have no idea who stole his wallet. It _____anyone.A. must have beenB. should have been
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I must have been insane to agree to his id
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I must have been insane to agree to his id
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A.must have been providedB.might have providedC.m
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