原文：Is this your shirt?
A:Whose shirt is that? Is this your shirt B?
B:NO,sir. It's not my shirt.This is my shirt ,my shirt is blue.
A:Is this shirt C's?
B：Perhaps it is ,sir.C's shirt's white.
A:C,is this your shirt?
C:Yes ,sir.
A:Here you are,catch.
C:Thank you sir.