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 this? it is theirs.