问题
选择题
________ is known to us all is that the old worker，for ________ life was hard in the past，still works hard in his seventies.
A．As；whom
B．What；whose
C．It；whose
D．What；whom
答案
答案：D
解析 考查名词性从句和定语从句的引导词。第一个空中what引导一个主语从句，并作从句的主语。第二个空代替先行词the old worker，并作介词for的宾语，用whom。