◎ 题干
He’s _______as a “bellyacher” —he’s always complaining about something.
A.who is known B.whom is known
C.what is known D.which is known
◎ 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’s _______as a “bellyacher” —he’s always complaining about something.A.who is known B.whom is known C.what is known D.which is known…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  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。