1. Whose address is this? – It is theirs.
2. Whose car is this? – It is ours.
3. Whose bag is this? – It is mine.
4. Whose room is this? – It is yours.
5. Whose house is this? – It is theirs.
6. Whose food is this? – It is its.
7. Whose socks are these? – They are his.
8. Whose flowers are these? – They are hers.
9. Whose bikes are these? – They are ours.
10. Whose money is it? – It is theirs.