选择合适的句子完成对话。

A. When do you come home? B. Would you like to swim? C. What about this evening? D. See you at six thirty. E. Where are you?

A: Hello, Billy. This is Tom.

B: I'm at the snack bar.

A:

B: At four.

A:  

B: Yes, but I want to watch cartoons at four thirty.     

A:

B: OK. Six thirty?

A: All right.