He must have learn English for three years,___? A.hasn't he B.haven't he C.mustn't he D.didn't he
为什么选B不选D
不还意思看错选项了是A
人气：104 ℃ 时间：2019-09-29 03:40:32
解答
因为这是现在完成时(过去分词),表示过去已经完成的事情关键词是have
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