29.The telephone ________ four times in the last hour,and each time it ________ for my roommate.
29.The telephone ________ four times in the last hour，and each time it ________ for my roommate.
A.has rung; was B.has been ringing; is
C.had rung; was D.rang; has been
可我认为应该选C。因为last hour过去了，应该用过去完成时呀！
人气：154 ℃ 时间：2020-03-26 00:58:28
解答
had rung是过去的过去,这里应该是过去,但不是过去的过去,所以应该用has rung
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