Insert absolute possessive pronouns.
Jason: Whose sunglasses are these?
Kate They're Amy's, I think. Yes, they're (1) MINE.
Paul: Whose baseball cap is this?
Amy: That's (2) ______ too! Thanks.
Kate: Ugh! Whose dirty towel is this?
Jason: Ask Paul. I think it's (3) __________ .
Paul: Yes, it is. Thanks. You've got a great T-shirt, Amy!
Kate: Thanks. I borrowed it from my big sister. So it's (4) __________ really.
Jason: What about this umbrella?
Paul: Don't be silly, Jason! You brought it, so it must be (5) __________.
Kate: Does this beach ball belong to us?
Jason: No, it isn't (6) __________. Those kids over there were looking for a ball, so it's (7) _________ probably.