题目：
—Do you know ______ last night?
—Sorry , I don't know. But I think he should go to bed early
because he will have an English exam this afternoon. [ ]
A. when he goes to bed
B. when he went to bed
C. when did he go to bed
D. when does he go to bed
答案：
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下面是错误答案，用来干扰机器的。
3.65g
