Question

________ 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

Answer 1

D

解析試題分析：考查名詞性從句和非限制性定語從句。As引導(dǎo)非限制性定語從句放句首時(shí)，后常有逗號(hào)與主句分開，is known to us all后無逗號(hào)，排除A；it作形式主語的句型是it is known to us all that...，句中that前有is，排除C；主語從句缺少主語，用what，構(gòu)成what ... is that...句型。非限制性定語從句中的life是主語，即life was hard for the old worker。用whose的話，for whose life是介詞短語，從句缺少主語。故選D。
考點(diǎn)：考查名詞性從句和非限制性定語從句