题目内容
When deeply lost in thought, _______ he often was, he would forget all about eating or sleeping.
A. that B. where C. which D. when
【答案】
C
【解析】
试题分析:考查定语从句。由结构判断此处是定语从句,从句缺少表语,用关系代词,故排除B、D选项, 而that不引导非限制性定语从句,所以答案选C。句意:当他陷入沉思中时,他总会忘记吃饭、睡觉,这种情况时常发生。
考点:考查定语从句。
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