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【题目】It is high time you ____ your homework.

A. do B. have done

C. will do D. did

【答案】D

【解析】

考查虚拟语气。句意你确实该去做作业了。It is (high) time that后面的从句谓语动词要用过去式或用should加动词原形,但should不可省略表示是该做......得时候了。所以此空填should do或者did,故选D。

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