1. 1. one, 2. two, 3. three, 4. four, 5. five, 6. six, 7. seven, 8. eight, 9. nine, 10. ten, 11. eleven, 12. twelve, 13. thirteen, 14. fourteen, 15. fifteen, 16. sixteen, 17. seventeen, 18. eighteen, 19. nineteen, 20. twenty.

2. 1. a single, 2. a pair, 3. a trio, 4. a quartet, 5. a handful, 6. a half dozen, 7. a couple, 8. an octet, 9. a handful, 10. a decade, 11. more than ten, 12. a dozen, 13. a baker’s dozen, 14. a score, 15. fifteen, 16. sweet sixteen, 17. seventeen, 18. eighteen, 19. nineteen, 20. twenty.