◎ 题干
When deeply absorbed in work,________he often was,he would forget all about eating or sleeping.                                                       
A.that B.which
C.where D.when
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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 deeply absorbed in work,________he often was,he would forget all about eating or sleeping. (2012·北京,26)A.thatB.whichC.whereD.when…”主要考查了你对  【限制性定语从句】【非限制性定语从句】  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。