Решение:
- chair — it
- tree house — it
- Mummy — she
- radio and table — they
- brother — he
- Grandma and I — we
- Daddy — he
- sister — she
- bed — it
- Grandpa — he
- Larry and Lulu — they
- table — it
- sister and I — we
- chair and bed — they
- brother and I — we
Ответ: 1. it, 2. it, 3. she, 4. they, 5. he, 6. we, 7. he, 8. she, 9. it, 10. he, 11. they, 12. it, 13. we, 14. they, 15. we.