... 20. c 9. b 21. c 10. d 22. a 11. a 23. c 12. a 24. a 25. a 26. b The following key identifies the unit to which each question corresponds. Unit # 9 10 11 12 13 14 15 ... a 3. c 15. b 4. d 16. c 5. d 17. a 6. a 18. c 7. b 19. c 8. c 20. a 9. b 21. b 10. a 22. a 11. b 23. b 12. d 24. a 25. c 26. a The following key identifies the unit ... 1,2, 3, 27, 28 2 13, 14, 15, 29, 30 3 4, 5, 6, 31, 32 4 7, 8, 9, 33, 34 5 16,17,18,35,36 6 10, 11, 12,37,38 7 19, 20, 21, 22, 39, 40 8 23, 24, 25, 26, 41, 42 1mB IListening 11 27....