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I’m not sure if he ______ in this exam. But if he ______ harder, he will do better.

A.succeeds; works B.will succeed; will work
C.will succeed; works D.succeeds; will work

C

解析试题分析:句意:我不确定他是否能在这次考试中成功;但是如果他工作得更努力,他会做得更好。本句中两个if 的意思并不一样。第一个if 意为是否,引导宾语从句,根据句意可知,考试还没进行,故用一般将来时;第二个if 意为如果,引导条件状语从句,从句中用一般现在时,主句用将来时。故选C。
考点:考查动词时态。

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