The maths problem is hard for us solve.A. so toB. so thatC. too toD. very to

问题补充：

The maths problem is hard for us solve.

A. so, to

B. so, that

C. too, to

D. very, to

答案：

A. so, to

B. so, that

(答案→)C. too, to

D. very, to

解析：so, to英语中无此搭配用法；so, that如此……以至于； too, to 太……而不能；very, to无此搭配用法。句意：对于我们来说，解决这道数学题太难。结合语境可知选C。