新概念一册 011&012－Is This Your Shirt

Sir：Whose shirt is that? Is this your shirt, Dave?

Dave：No, sir. It's not my shirt.  This is my shirt. My shirts blue.

Sir：Is this shirt Tim's?

Dave：Perhaps it is, sir. Tim's shirts white.

Sir：Tim!

Tim ：Yes, sir?

Sir：Is this your shirt?

Tim ：Yes, Sir.

Sir：Here you are. Catch！

Tim ：Thank you, sir.