题目内容：

They kown ____little English ____they couldn't understand it
A so that B such that C too to D very that

优质解答

so
that
如此.以至于

追问：

那老师C为什麼不行呢？

追答：

问得好！ to后面跟的是动词原形。 这里跟的是句子，用that。