________is known to us all that the old scientist, for ____________life was hard in the past, s...
________isknowntousallthattheoldscientist,for____________lifewashardinthepast,stillwo...
________is known to us all that the old scientist, for ____________life was hard in the past, still works hard in his eighties. [ ] A. It ; whom B. As ; whom C. As; whose D. What; whom
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