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    精英家教网 > 高中英语 > 题目详情
     —Where ____ Margaret have put the empty bottles?
    —She ______ them away. They must be somewhere.
    A．can; can’t have thrownB．must; needn’t
    C．must; must have thrownD．can; must throw
    A
    本题考查情态动词+have done表示对过去事实的推测的用法。must have done用于肯定句中，疑问句否定句中应用can could代替must。故选A。
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