is know 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
网友回答
A. As; whom
B. What; whose
C. It; whose
(答案→)D. What; whom
解析：第一空填What，是由What 引导的名词性从句作主语。第二个空是定语从句，whom
指前面的先行词the old worker。故答案选D。