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The meeting ______by the time I got there yesterday.

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The meeting ______by the time I got there yesterday.
A. was on B. has been on C. had begun D. has begun
详细解析,谢谢
The meeting ______by the time I got there yesterday.
答案c
昨天表示应该用过去时,by the time 是完成时的标志.所以选c
再问: begun 是瞬间动词,怎么能与完成时连用呢
再答: 瞬间动词也能与完成时连用,只是在肯定句中不能接一段时间……