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Mikeusedtobeatopstudent,buthe

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问题详情:

Mikeusedtobeatopstudent,buthe

Mike used to be a top student, but he______ behind since he lost himself in computer games. A. fell       B. has fallen       C. was      D. has been

【回答】

D

知识点:动词时态

题型:选择题

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