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Write down the plural forms of these nouns 1. orange ________ 2. class ________ 3. tomato ________4. monkey _________ 5. piano ________ 6. child ________ 7. jacket _________ 8. bed _________ 9. country ________ 10. man ________ 11. knife _________ 12. foot _________ 13. box _________ 15. photo _________ 16. fish________ 18.watch________