组卷网 > 初中英语综合库 > 语法 > 谓语动词的时态 > 主将从现 > 条件状语从句的主将从现
题型:单项选择 难度:0.4 引用次数:382 题号:9292929
I’m not sure_____________ he is right. __________ he is right, I will follow him.
A.when, ifB.whether, whetherC.if, whetherD.whether, if

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