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    精英家教网 > 高中英语 > 题目详情

    —Who has made a mess in my room?
    —Who else       it but your naughty son?
    A．could doB．could have doneC．didD．has done
    B
    考查情态动词用法。语境表示对过去发生并延续到现在的情况的推测，用could have done表示不肯定的语气。
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