The telephone three times in the last hour, and each time it for my sister. A. had rung; was B. has rung; was C. rang; has been D. has been ringing; is 查看更多

 

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The telephone _____ three times in the last hour, and each time it _____ for my sister.

A. had rung; was    B. has rung; was     C. rang; has been           D. has been ringing; is

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The telephone _____ three times in the last hour, and each time it _____ for my sister.

A.had rung; was                                     B.has rung; was

C.rang; has been                                     D.has been ringing; is

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