【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(yǔ)從句。句意:傳統(tǒng)觀點(diǎn)認(rèn)為,我們之所以睡覺(jué)是因?yàn)榇竽X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(shí)間狀語(yǔ),why做原因狀語(yǔ),根據(jù)句意,故排除AB;表語(yǔ)從句中的內(nèi)容是確定的,故排除C。that引導(dǎo)表語(yǔ)從句,不作成分,無(wú)詞義,僅起引導(dǎo)作用,故選D。

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