He was ____ tried ____ he fell asleep as soon as he lay down.A.too,to B.so,that C.such,thatD.enough,that

He was __so__ tried ___that_ he fell asleep as soon as he lay down.
他太累了，以至于他一躺下就睡着了，so......that太......以至于，基本的语法题目，选B

你好。答案是B

He was SO tried THAT he fell asleep as soon as he lay down.
== He was tired ENOUGH TO fall asleep as soon as he lay down.

这道题目选择B表示“他太累了，一躺下就睡着了。”
结果状语从句表示结果，用的关联词是so... that、such... that、so that、with the result that等，结果状语从句置于主句之后，如：
In such a fury was he that he threw the stone tablets upon the ground so that they were broken.
So little pay did he get that his family had to live on welfare money.
Such a good chance is it that we mustn't miss it.
Such was the weather that I couldn't go out.
I was in the bath, with the result that I didn't hear the telephone.
So many of them were there that they couldn't all get into the room.
希望我能帮助你解疑释惑。

选B，so+adi+that+句子
不选A是因为too+adj+to do sth，比如：He is too young to go to school.
such后不直接加tired；
D的话，enough 放在形容词后修饰名词，如old enough等等
enough 一般和to搭配，比如，He is not old enough to go to school.
所以不选D

选 B so ……that ……如此……以致于……
A too +形容词+to do sth 不能跟从句,所以排除
C such +名词短语+that 所以排除
D 没有这种搭配,排除.