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

A. if; Whether B. whether; Whether

C. if; That D. if; If

【答案】D

【解析】

试题分析:句意:我不知道他明天是否会来。如果他来,我会告诉你。If如果,引导条件状语从句;是否,引导宾语从句;Whether是否,引导宾语从句。That那,可以引导宾语从句。所以选D。

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