组卷网 > 初中英语综合库 > 单词辨析 > I > if (是否)
题型:单项选择 难度:0.85 引用次数:260 题号:3837836
—Lucy, will your parents come here?
—It’s raining now. I don’t know _______ they will come or not.
A.ifB.whenC.whether

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