问题描述：
一道现在完成时和过去时区别的英语选择题
－______ he______ at this school last term?
－Yes,I think so.
A.Did,study B.Has,studied C.Was,study D.Did,studied
答案给的是选B,为什么不选A呢
－______ he______ at this school last term?
－Yes,I think so.
A.Did,study B.Has,studied C.Was,study D.Did,studied
答案给的是选B,为什么不选A呢
问题解答：
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