There is (so/such) little water left that we are all thirsty.用哪个?

题目

There is (so/such) little water left that we are all thirsty.用哪个?
为什么？

答案

There is so little water left that we are all thirsty.
【so.that..】如此...以至于
固定词组
水太少了,以至于我们都很口渴
有不会的可以再问我