◎ 题干
He is good at English, _____ we all know.

A. that
B. as
C. whom
D. what
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“He is good at English, _____ we all know. [ ]A. that B. asC. whom D. what …”主要考查了你对  【关系代词】【非限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。