题目内容

My cell-phone  has disappeared. Who       have taken it away?
A．couldB．shouldC．mustD．might
A
考查情态动词。句意：我的cellphone不见了，会是谁把它拿走了呢?此处could have done表示“可能做过某事”。should have done表示“本来应该做某事(但实际上并没有做)”；must have done表示“一定做了某事”；might have done表示“也许做了某事”。
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