◎ 题干
   is known to us all is that the old worker,    life was hard in the past, still works hard in his seventies.
A.As; whom B.What; whom
C.It; whose D.What; whose
◎ 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, life was hard in the past, still works hard in his seventies. A.As; whom B.What; whomC.It; whoseD.What; whose…”主要考查了你对  【主语从句】  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。