_________ is known to us all is that the old scientist, for _________ life was hard in the past, still works very hard in his eighties.
A.It; whose | B.What; whom | C.As; whom | D.As; whose |
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_________ is known to us all is that the old scientist, for _________ life was hard in the past, still works very hard in his eighties.
A.It; whose | B.What; whom | C.As; whom | D.As; whose |