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.is known to us all is that the old scientist, for .life was hard in the past, s

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.is known to us all is that the old scientist, for .life was hard in the past, s

________.is known to us all is that the old scientist, for ________.life was hard in the past, still works hard in his eighties.

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A.It ;hose

B.As; whom

C.As; whose

D.What ;whom

试题答案

答案:D