Sam：It's ________!

Amy：It isn't yours, Sam．It's mine!

Ms Smart：What's the ________?

Amy：Sam wants to wear my T-shirt．

Sam：But it isn't ________．It's mine!

Amy：It isn't his．It's mine!

Ms Smart：But both your red T-shirts are there．

They are ________．Look!

Sam：Then ________ T-shirt is it?

Lingling：It's mine．Look!

Sam：I'm sorry, Lingling．And I'm sorry, Amy．

Amy：I'm sorry, too．

Lingling：That's OK．