从方框中选择最佳选项完成对话，有两项多余。

A. My parents got angry with me.  B. Maybe I can help you with it.  C. The teacher said I could do better.  D. What’s the matter with you?  E. I really had a difficult time studying math.  F. Why not go home and say sorry to your parents?  G. That’s too bad.

A:  Hello, Mark! You look unhappy.    1  
B:  I argued with my parents last night. 
A:  Why did you do that? 
B:  I got my report card yesterday.  I didn’t do well in math.    2  
A:    3   You should work harder at math. 
B:  I know, but I find it really difficult and I really don’t know how to improve it. 
A:    4   
B:  That’s great.   Thanks a lot. 
A:  You’re welcome.    5   
B:  I will.