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    精英家教网 > 高中英语 > 题目详情

    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：  that引导表语从句，用来说明主语的内容。根据句意，空格内要填that，说明主语The traditional view的内容。

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