—Do you know when       back?
—I don’t know. But if he        back, I will call you.
A、will he come, comes         
B、he will come, comes
C、he comes, will come

B

解析試題分析:句意:你知道他什么時候回來?我不知道,但是他一回來我就會給你打電話,表示時間,意為“當(dāng)……時;在……的時候”。在時間、條件等狀語從句里,用一般現(xiàn)在時表示將來時,when 為何時時,從句用將來時.結(jié)合句意,故選B
考點:考查時態(tài)的用法

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