问题补充:
is known to us all isthe 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
答案:
A. What; what
(答案→)B. What; that
C. That; what
D. As; that
解析:考查名词性从句。第一空是主语从句,缺少主语,所以用what,第二空是表语从句,由that引导,所以选B。