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I don’t know if Jack ________. If he ________, call me, please.

         A. comes; come           B. will come; will come

         C. will come; comes


【答案】C

【解析】考查从句时态用法。句意:我不知道杰克是否会来。如果他来了,请给我打电话。第一句中的if=whether, 引导的是宾语从句。Jack还没有来,会不会来还不知道,该用将来时态还是用将来时态。后一句中的if从句为条件状语从句。在时间和条件状语从句中,用现在时态表示将来,所以选择答案C。


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