so...that \enough...that 区别

问题描述:

so...that \enough...that 区别
He was _________ tired __________ he fell asleep as soon as he lay down.
A.too;to B.so;that C.such;that D.enough;that
那B有什么不对,为什么是D?D感觉怪怪的.
求B,D的具体用法.

你确定答案没弄错吗?
在语法上没见过enough...that,即使语法对翻译也不通顺啊.
so...that主要的句型是:so+adj.+that从句,翻译为“如此...以至于...”