The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when            B. why              C. whether              D. that

D


解析:

主要測(cè)試表語(yǔ)從句。結(jié)合具體語(yǔ)境可知句子意思為：傳統(tǒng)的觀點(diǎn)是因?yàn)槲覀兊拇竽X已經(jīng)設(shè)定好讓我們睡覺，所以我們睡覺。由以上譯文可知句子中并不缺少任何成分只是少了應(yīng)道表語(yǔ)從句的引導(dǎo)詞。

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