Can you tell me how the problem ?A. did solveB. to solveC. solvingD. solved

问题补充：

Can you tell me how the problem ?

A. did solve

B. to solve

C. solving

D. solved

答案：

A. did solve

(答案→)B. to solve

C. solving

D. solved

解析：句意：你能告诉我怎样解决这个问题吗？根据题干，how后面的句子没有主语，故本句应该是一个简单句，其结构是“特殊疑问词+to do”。故选B。