下图表示人体细胞与外界环境之间进行物质交换的过程，Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ表示直接参与的几

A. But I argued with my best friend yesterday.   B. That’s a good idea. C. I don’t have enough time. D. What should I do?  E. I’ll try to apologize (道歉) to her.

A: I want to get good grades.     34   
B: Maybe you could attend after-school class on weekends.
A:     35   I have to do my homework on weekends.
B: Well, you could ask your friends for help.
A:     36   
B: You should say “sorry” to your friend.
A: OK.    37        
B: I think you shouldn’t play computer games or watch TV any more.
A:     38   I’ll study harder and harder from now on.