1. mouse – 2. rabbit -– 3. deer – 4. horse – 5. sheep – 6. fox – 7. fish – 8. tooth – 9. tomato – 10. game – 11. duck – 12. foot – 13. ostrich – поставить во множественное число

1. mouse – mice

2. rabbit – rabbits

3. deer – deer

4. horse – horses

5. sheep – sheep

6. fox –  foxes (иногда fox)

7. fish – fish

8. tooth – teeth

9. tomato – tomatoes

10. game – games

11. duck – ducks

12. foot – feet

13. ostrich – ostriches