the help of my teacher I worked out the problem in the end.A. UnderB. OnC. WithD. For

问题补充：

the help of my teacher, I worked out the problem in the end.

A. Under

B. On

C. With

D. For

答案：

A. Under

B. On

(答案→)C. With

D. For

解析：句意： 在老师的帮助下，我最终做出了这道题。with the help of…在。。。的帮助下

故选C。