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【题目】I don’t know _____ he will come. ____ he comes, I will tell you.

A.whether; WhetherB.if; IfC.if; WhetherD.that; If

【答案】B

【解析】

句意:我不知道他是否会来。如果他来了,我就会告诉你。

考查宾语从句和条件状语从句。whether是否;if如果;是否;that那个。前一句是宾语从句,根据…he comes, I will tell you.可知我并不知道他是否会来,用whetherif都可以。第二句是条件状语从句,主将从现,用if引导。故选B

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