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

admin2013-06-10  40

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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