题目内容
【题目】 ________ 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】D
【解析】
试题分析:名词性从句和非限制性定语从句为本题主要考查点。As引导非限制性定语从句放句首时,后常有逗号与主句分开,is known to us all后无逗号,排除A;it作形式主语的句型是it is known to us all that...,句中that前有is,排除C;主语从句缺少主语,用what,构成what ... is that...句型。非限制性定语从句中的life是主语,即life was hard for the old worker。用whose的话,for whose life是介词短语,从句缺少主语。故选D。

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