BASIC
1. railroad
2. airport
3. seat belt
4. everywhere
5. homesick
6. understand
7. background
8. anything
9. ninety-nine
10. already
11. fireplace
12. ourselves
13. all right
14. forever
15. breakfast
16. whenever
17. everything
18. meanwhile
19. afternoon
20. make-believe
REVIEW
21. inside
22. outside
23. birthday
24. baseball
25. sometimes
CHALLENGE
26. landmark
27. nationwide
28. postscript
29. motorcycle
30. handkerchief
BASIC
1. sailor
2. harbor
3. enter
4. weather
5. labor
6. ladder
7. cellar
8. chapter
9. sugar
10. suffer
11. collar
12. proper
13. motor
14. favor
15. bitter
16. beggar
17. shower
18. temper
19. feather
20. doctor
REVIEW
21. summer
22. center
23. neighbor
24. dollar
25. daughter
CHALLENGE
26. schooner
27. anchor
28. stellar
29. lunar
30. solar
BASIC
1. nickel
2. metal
3. total
4. eagle
5. middle
6. special
7. final
8. model
9. bottle
10. double
11. towel
12. medal
13. battle
14. candle
15. trouble
16. handle
17. simple
18. uncle
19. title
20. cattle
REVIEW
21. little
22. able
23. circle
24. purple
25. apple
CHALLENGE
26. decimal
27. financial
28. trifle
29. cancel
30. industrial
BASIC
1. dancing
2. skipped
3. hiking
4. flipped
5. snapping
6. raced
7. landed
8. pleasing
9. checking
10. dared
11. dimmed
12. rubbing
13. striped
14. wasting
15. traced
16. stripped
17. tanning
18. smelling
19. phoning
20. fainted
REVIEW
21. cared
22. joking
23. tapping
24. wrapped
25. fixing
CHALLENGE
26. breathing
27. tiring
28. urged
29. scarred
30. striving
BASIC
1. beauty
2. ugly
3. lazy
4. marry
5. ready
6. sorry
7. empty
8. honey
9. valley
10. movie
11. duty
12. hungry
13. lonely
14. alley
15. body
16. plenty
17. turkey
18. hockey
19. fifty
20. monkey
REVIEW
21. pretty
22. sadly
23. friendly
24. city
25. slowly
CHALLENGE
26. fiery
27. envy
28. mercy
29. medley
30. imaginary
unit 13 unit 16
1. seat belt 31. skipped
2. everywhere 32. snapping
3. anything 33. checking
4. already 34. pleasing
5. background 35. raced
6. breakfast 36. fainted
7. meanwhile 37. stripped
8. ourselves 38. phoning
9. forever 39. striped
10. make-believe 40. rubbing
unit 14 unit 17
11. sailor 41. ready
12. cellar 42. valley
13. chapter 43. beauty
14. harbor 44. honey
15. sugar 45. movie
16. beggar 46. hockey
17. doctor 47. lonely
18. feather 48. fifty
19. collar 49. alley
20. motor 50. hungry
unit 15 challenge
21. double 51. imaginary
22. special 52. striving
23. final 53. trifle
24. model 54. financial
25. eagle 55. handkerchief
26. towel 56. schooner
27. candle 57. medley
28. medal 58. tiring
29. trouble 59. stellar
30. cattle 60. nationwide