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【题目】I don’t know he’ll come. I will let you know he comes.

A.if; whetherB.whether; whetherC.if; ifD.whether; that

【答案】C

【解析】

句意:我不知道他是否会来,如果他来了,我会让你知道。

考查宾语从句和状语从句中ifwhether用法。if如果,是否;whether是否。第一句为宾语从句,连接词可用ifwhether,表“是否”;第二句考查条件状语从句,符合主将从现的原则。只能由if引导。故选C

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