is known to us all is     the old scientist, for whom life was hard in the

past, still works very hard in his eighties.

      is known to us all is     the old scientist, for whom life was hard in the past, still works very hard in his eighties

1. A.
   What; what
2. B.
   What; that
3. C.
   That; what
4. D.
   As; that

      is known to us all is      the old scientist, for whom life was hard in the

  past, still works very hard in his eighties.

       A. What; what     B. What; that      C. That; what       D. As; that

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

_______ 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; whose????????????? ???? C. As; whom????? ????????????? D. It; whose