写出下列名词的复数形式。

1. map________________ 3. church________________ 5. hero________________ 7. leaf________________ 9. tooth________________ 11. boat________________ 13. photo________________ 15. factory________________ 2. dish________________ 4. boy________________ 6. radio________________ 8. foot________________ 10. box________________ 12. dress________________ 14. potato________________ 16. mouth ________________

1. maps 2. dishes 3. churches 4. boys 5. heroes 6. radios 7. leaves 8. feet 9. teeth 10. boxes 11. boats
12. dresses 13. photos 14. potatoes 15. factories 16. mouths