【題目】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】

考查表語從句。句意:傳統(tǒng)觀點認為,我們之所以睡覺是因為大腦中有程序讓我們這么做。分析句子可知,此處不缺少任何成分,when做時間狀語,why做原因狀語,根據(jù)句意,故排除A、B;表語從句中的內(nèi)容是確定的,故排除C。that引導表語從句,不作成分,無詞義,僅起引導作用,故選D。

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