He ___ at the meeting this morning.He was in hospital at the time.A.couldn’t hav
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He ___ at the meeting this morning.He was in hospital at the time.A.couldn’t have spoken | B.mustn’t have spoken | C.shouldn"t have spoken | D.needn’t have spoken |
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答案
A |
解析
作“不可能”一类的否定推测,不要用mustn’t,而要用couldn’t. |
举一反三
He ___ be in the garden.He must be in the room. ‘A.can"t | B.mustn’t | C.will not | D.may not |
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