by end of last term 和last term 什么区别呢?
She must have studied very hard "by end of last term",hadn't she ?
She must have studied very hard last term,didn't she ?
人气：163 ℃ 时间：2019-11-07 16:09:18
解答
by the end of +过去某个时间,用hadn't
过去某个时间,用didn't
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