问题
选择题
------He was _____ tired ______ he fell asleep as soon as he lay down.
-------Oh ,we can go out and let him have a good rest.
A．too ,to
B．so, that
C．enough ,to
D．such ,that
答案
答案：B
考查句型：so+形容词或副词+that从句，表示如此…以至于…引导结果状语从句。句意：他如此的累以至于他一躺下就睡着了。所以选B。