◎ 题干
________ is known to us all is that the old worker,for ________ life was hard in the past,still works hard in his seventies.
A.As;whom B.What;whose
C.It;whose D.What;whom
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“________ is known to us all is that the old worker,for ________ life was hard in the past,still works hard in his seventies.A.As;whomB.What;whoseC.It;whose…”主要考查了你对  【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。