Solution:
- I am a mouse.
- This is my little house.
- The frog sees me.
- She is green and small.
- The hare visits her.
- His ears are long.
- The fox brings him a flower.
- The wolf looks at it.
- They are all animals.
- Their bear joins them.
- We live together.
- This is our home.
- The house is our treasure.
- I love my friends.
Answer: 1. I, 2. my, 3. me, 4. She, 5. her, 6. His, 7. him, 8. it, 9. They, 10. Their, 11. them, 12. We, 13. our, 14. our, 15. I.