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II. 6. b 7. d 8. d 9. c 10. a 11. d
12. b 13. c 14. d 15. b

IIl. 16. a 17. c 18. d 19. b 20. d 21. d
22. c 23. b 24. c 25. d

IV. 26. d (has been identified) 30. c (process by

which). 34. d (boat).

27. b (safe enough) 31. d (economic)
35. c (coming)

28. a (Because of) 32. b (obtained)

29. c (to) 33. b (live)

V. 36 b 37. c 38. d 39. a 40. b 41. d
42. c 43. d 44. a 45. C

VI. 46. b 47. c 48. b 49. a 50. d

ĐÁP ÁN

UNIT 12

I. /s/: race, recycle, center, bus, advice, sight, slow, concert, price,
works

/z/ : rose, music, because, zoo, reason, amaze, cousin, prize, caves, has