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(Mr. Black is our PE teacher. He is talking something left on the gym.)

Mr. Black: Guys, come here. There are something left here.

Amy:Look at these shoes, are these yours?

Amy: No, they aren't. My shoes are green. They're Chen Jie's.

Mr. Black: What about this hat? Is this John's?

Amy: No, it isn't. It's Mike's.

Mr. Black: Mike, Is this yours?

Mike: Yes, it is.

Mr. Black: Whose cup is it?

Mike: It's John's. John's cup is blue.

Mr. Black: John, Is this yours?

John: Yes, it's mine. Thank you very much.

Mr. Black: Please take good care of your things.