题目

You look so tired tonight. It is high time you_________. A. went to bed     B. went to sleep     C. go to bed     D. to sleep 答案：A 解析: 本题是虚拟语气的考查。It is(hi曲)time that后接的从句中谓语动词需用过去式。go to bed是固定用法。

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