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【题目】I don’t know ________ he will come tomorrow. ________ he comes, I’ll tell you.

A. if; WhetherB. whether; That

C. that; IfD. whether; If

【答案】D

【解析】

句意:我不知道他明天是否会来。如果他来,我就告诉你。考查连词辨析。前句是宾语从句,表疑问,需用whether(是否)引导;后一句是条件状语从句,需用if引导。根据句意结构和语境,可知选D

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