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:635 题号:1894529
I don’t doubt _________ his advice is well worth________.
A.that, to takeB.if, to takeC.whether, takingD.that, taking

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