试题与答案

—Mike doesn't look happy. What's wrong w

题型:选择题

题目:

—Mike doesn't look happy. What's wrong with him?

—It seems that he has some trouble ______ that problem. [ ]

A. solve  

B. solves  

C. solving    

D. to solve

答案:

答案:C

试题推荐
微信公众账号搜索答案