The traditional view is __ we sleep because our brain is "programmed" make us do so.A when B why C whether D that选什么?为什么?翻译?还请求教.

问题描述:

The traditional view is __ we sleep because our brain is "programmed" make us do so.
A when B why C whether D that
选什么?为什么?翻译?还请求教.

that,表语从句

D

D.that
后面半句是一句完整的句子,不缺任何成分,只需要用that带起来就可以了.