IV. Rewrite the following words in the plural form (Viết dạng số nhiều cảu các danh từ sau). 1. book 2. boy ...........................................3. tomato 4. teacher 5. life ........................................... 6. German 7. watch 8. sheep..........................................9. Frenchman 10. piano 11. child ........................................12. baby 13. photo 14. bench ......................................15. bus 16. box 17. tooth .......................................18. foot 19. Chinese 20. wish ........................................21. brush 22. play 23. ship .........................................24. leaf 25. exercise 26. city ..........................................27. glass 28. man-driver ......................... 29. footballer ................................ 30. class