WHO'S THAT?
BROTHER
WHOSE BIKE IS IT?
IT'S SARAH'S BIKE
WHOSE COMPUTER IS IT?
IT'S TOM'S COMPUTER
WHOSE BOOK IS IT?
IT'S LUCA'S BOOK
WHO'S THAT?
GRANDFATHER
WHO'S THAT?
GRANDMOTHER
WHO'S THAT?
SISTER
WHO'S THAT?
MOTHER
WHO'S THAT?
FATHER