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I am not sure if Tom____ home. If he________,  I'll call you.

A.willcome,willcome B.comes,willcome
C.will come, comes D.will come, come

C

解析试题分析:句意:我不确定Tom是否来我家。如果他来,我就给你打电话。第一个句子是由if引导的宾语从句,时态是主现从任意,结合句意可知要用将来时。第二个句子是由if引导的条件状语从句,主将从现。故选C。
考点:考查从句的时态辨析。

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