This is the best way I have thought of the problem.
A. that; solving
B. in which; solving
C. which; to solve
D. /; to solve
网友回答
A. that; solving
B. in which; solving
C. which; to solve
(答案→)D. /; to solve
解析：考察定语从句和特殊用法。定语从句I have thought of修饰先行词the best way，I前面省略了that.第二空是特殊用法：the way to do sth= the way of doing sth做某事的方法。故D正确。句意：这是我想起来的解决问题的最好方法。