Miss Li asked a question,but it was ________ that nobody could anw

问题描述:

Miss Li asked a question,but it was ________ that nobody could anw
it.
[ ]
A.very diffcult
B.too diffcult
C.diffcult enough
D.so diffcult

正确答案为:
D so difficult
so.that.太...以至于...固定搭配