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