问题
选择题
The traditional view is _______ we sleep because our brain is “programmed” to make us do so.[ ]
A. when
B. why
C. whether
D. that
答案
答案：D
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The traditional view is _______ we sleep because our brain is “programmed” to make us do so.[ ]
A. when
B. why
C. whether
D. that
答案：D