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【题目】The traditional view is _____________ we sleep because our brain is programmed to make us do so.

A.whenB.why

C.whetherD.that

【答案】D

【解析】

考查表语从句。句意:传统观点认为,我们之所以睡觉是因为大脑中有程序让我们这么做。分析句子可知,此处不缺少任何成分,when做时间状语,why做原因状语,根据句意,故排除AB;表语从句中的内容是确定的,故排除Cthat引导表语从句,不作成分,无词义,仅起引导作用,故选D

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