◎ 题干
When he was working there he caught a serious illness from______ efforts he still suffers.  
[    ]
A. which         
B. that            
C. whose          
D. what
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When he was working there he caught a serious illness from______ efforts he still suffers.[ ]A. whichB. thatC. whoseD. what…”主要考查了你对  【关系代词】【限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。