She knows so much about England. She there before. A. must beB. must have beenC. must liv

发布时间：2020-08-16 11:29:08


She knows so much about England. She      there before.

A. must be
B. must have been
C. must live
D. must have lived in

网友回答

A. must be
(答案→)B. must have been
C. must live
D. must have lived in
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