－I didn’t know you were good friends.－You . I have known her since she moved here. You wer

问题补充：

－I didn’t know you were good friends.

－You . I have known her since she moved here. You were studying abroad then.

A. may have

B. needn’t have

C. couldn’t have

D. must have

答案：

A. may have

B. needn’t have

(答案→)C. couldn’t have

D. must have

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