根据对话内容判断正误。
Tom: Dad, Would you like to play ping pong with me?
Dad: Sure.
Tom: I can't find my ping pong. Where is it?
Dad: Is it in your desk?
Tom: Let me have a look. No, it isn't.
Dad: Tom, come here, please
Tom: Yes, Dad.
Dad: Is the ping pong under the bed yours?
Tom: No, it isn't. It's my brother's.
Dad: Look! There is a ping pong behind the door. It must be yours.
Tom: Oh, yes. Thank you, Dad!
