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A:Do you konw _____ for Shanghai last night?B:At 9:00.

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A:Do you konw _____ for Shanghai last night?B:At 9:00.
A.what time he leaves B.what time does he leave C:what time he left D:what time did he leave.该选哪个?为什么?为什么不选B?
C:what time he left
last night为过去一明确时间,故A/B错误;D:what time did he leave为特殊疑问句机构,而非从句结构(从句结构由:疑问词+主语+谓语.构成)