Решение:
- Whose is this? Is it mine?
- Yes, it's my pencil.
- This is our house. It is ours.
- Are these her muffins? Yes, they are hers.
- Is this your bike? No, it's my brother's. It's his.
- Don't eat the biscuit, it's its.
- Whose dirty shoes are these? They are the children's. They are theirs.
Ответ: 1. mine; 2. ours; 3. hers; 4. his; 5. its; 6. theirs.