1. It’s their problem, not ours.
2. This is a nice camera. Is it yours?
3. That’s not my umbrella. Mine is black.
4. Whose books are these? Yours or mine?
5. Catherine is going out with her friends this evening.
6. My room is bigger than hers.
7. They’ve got two children but I don’t know their names.
8. Can we use your washing machine? Ours is broken.
