This is the best way I have thought of the problem.
A. to be solved
B. solving
C. to solve
D. solves
网友回答
A. to be solved
B. solving
(答案→)C. to solve
D. solves
解析：考查不定式做定语，分析句子成分，I have thought of是定语从句修饰the best way，后面的不定式也是定语修饰the best way，句意：这是我能想到的最好的解决问题的办法。选C。