Great!Your English is very excellent.Do you learn it here? No.I__as an exchange student in America
for 2 years.
A、had studiedB、were studingC、have studiedD、studied
请详解一下,重点解释ACD三个选项
答案是D
人气：141 ℃ 时间：2020-04-24 05:40:53
解答
已不在当年做交换生这个情境,所以无需完成时,用过去式即可.而且A中没有过去式这一层直接跳到过去完成时显然不对.
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