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【题目】She looks very happy. She_________ the exam.

A.can have passedB.should have passedC.must have passedD.could have passed

【答案】C

【解析】

考查情态动词。句意;她看起来很高兴。她一定通过了考试。must /could+ have done表示对过去发生的事情的推测,意为“一定/可能(已经)… ”,本句中根据语境She looks very happy可判断,用 must have passed语气较强,意为“一定是已经通过了(考试)”,故排除D项,选C

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