He (buy)______the dictionary. He may use mine.needn’t have bought从He may use min

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问题 He (buy)______the dictionary. He may use mine.

选项

答案 needn’t have bought

解析从He may use mine.可以推断空格处表示的是虚拟语气。对过去本没有必要做的动作却做了，要用needn’t have done。

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