题目内容

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

答案：A
解析：

　　in the last hour, in the past/last twenty years等,　都指刚刚过去而持续到说话时为止(或长或短)的一段时间, 因此动词要用现在完成时。 电话铃在 一个小时内反复响了四次, 每次都是同屋的。每次是具体所指, 句中动词要用过去时。


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