I can never understand the reason _______ he explained to me. A.why B.that C.when D.where
2022-05-14 12:37:10 83次 上海市2019-2020学年高一4月月考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I can never understand the reason _______ he explained to me.
A.why B.that C.when D.where
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