问题
选择题
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
答案：A
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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