问题 选择题

What do you do when it _____?

--- I often stay at home and read books.

A.raining

B.rain

C.rains

D.is rains

答案

答案:C

考察时态。when引导时间状语从句。从句描述的是反复性的动作,故用一般现在时态。主语是it,单数第三人称,故谓语动词要用单数形式。选C。

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