题目内容：

When was the 29th Olympic Games held?____ 8:00 of August 8th,2008,Beijing
为什么要填at 而不是on?

优质解答

因为8：00是个钟点,钟点前应该用at,英语的介词用法非常明确,可以说是“各管各”,即由最小的时间概念决定介词, 8:00 of August 8th,2008这一短语中,8：00最小,用at; August 8th,2008中8th最小,所以用on,即 on Au...