The scientist, ________ life had once been very hard, became world-famous after the great discovery.A.in whichB.for whomC.for whoseD.in whom
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B解析考查定语从句中介词+关系词的用法。本句话中的先行词为scientist,因此A不正确;同时选C时和life构成介词短语,句子缺少主语,因此也不正确;根据句意可知B正确,翻译为“对于这个科学家而言,生活曾经十分困难”。