The popular belief has been challenged after a recent research ________ cartilage(软骨) in human joint...
2022-08-10 11:10:03 51次 江苏省徐州市2019-2020学年高三上学期期中英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The popular belief has been challenged after a recent research ________ cartilage(软骨) in human joints can’t repair itself.
A.where B.whether C.when D.that
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