根据对话内容的理解及给出的选项完成对话。

A. But you can eat in the dining hall. B. No, you can't. C. Sorry, I don't know. D. Don't fight with your classmates. E. don't arrive late for class.

A: Hey, Dave. Do you know the rules?

B:  Can you tell me?

A: First,   you must be on time.

B: Can I eat in the classroom?

A: No, you can't.

B: Can I listen to music in class?

A:  But you can listen to it outside or in the music room.

B: What else?

A:  That makes the teachers really unhappy.

B: I see. Thank you.