Beneath each of the following sentences there are four choices marked A, B, Cand D. Choose the one answer that best completes the sentence.The traditional view is _______ we sleep because our brain is “programmed”to make us do so.


  1. A.
    when
  2. B.
    why
  3. C.
    whether
  4. D.
    that
D
思路分析：句意為：傳統(tǒng)看法是我們得睡眠因?yàn)槲覀兊拇竽X天生讓我們這樣做。that引導(dǎo)表語從句且在表語從句中不作成分。When, why, whether與句意不符。
【點(diǎn)評】本題考查表語從句，難度中等。
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