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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:635

________ 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
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isknowntousallisthattheoldwork