These are ... They're ...
These are the girls' bags. They're their bags.
These are ... They're ...
These are the girls' hats. They're their hats.
These are ... They're ...
These are the boys' bicycles. They're their bicycles.
This is .. It's ...
This is Mr Brown's hat. It's his hat.
This is .. It's ...
This is Mary's umbrella. It's her umbrella.
These are ... They're ...
These are the boys' books. They're their books.
This is .. It's ...
This is Rose's bicycle. It's her bicycle.
This is ... It's ...
This is Oliver's cat. It's his cat.