I am not sure if Tom____ home. If he________,  I'll call you.
A．willcome,willcomeB．comes,willcome
C．will come, comesD．will come, come
C

試題分析：句意：我不確定Tom是否來我家。如果他來，我就給你打電話。第一個句子是由if引導(dǎo)的賓語從句，時態(tài)是主現(xiàn)從任意，結(jié)合句意可知要用將來時。第二個句子是由if引導(dǎo)的條件狀語從句，主將從現(xiàn)。故選C。
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