The traditional view is we sleep because our brain is “programmed to make us do so.A．when B．why C．whether D．that 题目和参考答案——青夏教育精英家教网—

题目内容

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

A．when B．why C．whether D．that

【解析】D　[that此处引导表语从句，不具有任何意义，但是不能省略。]

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