补全对话
A: Hi, John.
B: No, but I have a ping-pong bat.
A: Is this ping-pong bat yours?
B: Maybe it's Tony's.
A:
B: Yes. I often play once or twice at weekends.
A: Three times a week.
B: Can I join your game this weekend?
A:
A.Of course.
B.Do you play ping-pong often?
C.No, it's not mine.
D.How often do you play?
E.Do you have a baseball bat?