问题描述：
40. 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为什么不能选B而要选D？？？3Q～
问题解答：
The traditional view 说明已经有了定论,干嘛还用why呢?
上海旅游网