is known to us all that the old scientist，for life was hard in the past，still works hard in his eighties．（　?。?/h1>

A．It； whom

B．As；whose

C．As；whom

D．It；whose

【答案】A

【解答】

【點評】

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發布：2024/4/20 14:35:0組卷：76難度：0.9

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相關試卷

A．As is required	B．It is required
C．It requires	D．What is required

______ is known to us all that the old scientist，for ______ life was hard in the past，still works hard in his eighties．（ ?。?/h1>