Do they have kites? Yes, they do. They're their pencils. They're theirs .
Do Paul and Mary have horses ? Yes they do. They're their horses. They're theirs.
Does Jim have a guitar? Yes, he's. It's his guitar. It's his.
Does Sue have a doll? Yes, she has. It's her doll. It's hers .
Does Ann have a computer? Yes, she's . It's her computer. It's hers.