- It’s raining. When did it start?- As far as I know, it for three hours.A. rains B. rained C. has rained D. will rain 题目和参考答案——青夏教育精英家教网—

题目内容

— It’s raining. When did it start?

— As far as I know, it ____ for three hours.

A. rains B. rained

C. has rained D. will rain

【解析】

试题分析：句意：下雨了。什么时候开始的？——据我所知，已经下了三个小时了。结合语境可知本句描述的是从过去一直持续到现在的动作，故用现在完成时态。选C。

考点：考查时态辨析

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