I think that’s the only way we can think of the math problem.A. solveB. solvesC. to solv

问题补充：

I think that’s the only way we can think of the math problem.

A. solve

B. solves

C. to solve

D. solving

答案：

A. solve

B. solves

(答案→)C. to solve

D. solving

解析： 表示将来的状况，故用不定式作定语。