读对话，选择正确答案的序号
(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.