I’m sure your suggestions will the problem.
A. contribute to solving
B. contribute to solve
C. be contributed to solve
D. be contributed to solving
网友回答
(答案→)A. contribute to solving
B. contribute to solve
C. be contributed to solve
D. be contributed to solving
解析： 考查语态。主语your suggestions和动词contribute是主谓关系，所以要用主动语态，排除C,D；contribute to，有助于，to是介词，后面要用doing形式，所以选A。