题目内容
The telephone____four times in the last twenty minutes,and each time it___for my roommate.
A.rang;has been B.has been ringing;is
C.had rung;was D.has rung;was
D
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题目内容
The telephone____four times in the last twenty minutes,and each time it___for my roommate.
A.rang;has been B.has been ringing;is
C.had rung;was D.has rung;was
D