组卷网 > 高中英语综合库 > 语法 > 句法 > 复合句 > 名词性从句 > 同位语从句 > 同位语从句的连接词
题型:单项选择 难度:0.4 引用次数:3828 题号:9268295
The popular belief has been challenged after a recent research ________ cartilage(软骨) in human joints can’t repair itself.
A.whereB.whetherC.whenD.that
【知识点】 同位语从句的连接词

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