1. spaceshipone 2. mother' s day 3. pale male 4. texas rangers 5. online education 6. american flag 7. black history month 8. a liquid crop 9. highways and freeways 10. popular books 11. "gone with the wind" 12. valentine' day 13. cherry trees 14. "living fossil" 15. americans on the move 16. may day in america 17. personal postage stamps 18. world environment day 19. food safety in america 20. trial by jury 21. mcdonald' s anniversary 22. new year' s eve ball drop 23. top movies 24. toefl 25. military colleges 26. medical school 27. harvard university 28. m.i.t. 29. cost to study in the u.s. 30. health insurance 31. where to live 32. teaching assistants 33. alcohol ban at university 34. universities in the u.s. 35. ipod experiment at duke 36. act against education law 37. compare education systems 38. jobs for new graduates 39. teachers or tutors 40. freshman fifteen 41. steve fossett 42. the facebook.com 43. "chronicles,volume one" 44. makeover home edition 45. april fool's day 46. children to children 47. abraham lincoln 48. unusual laws 49. world series of poker 50. last "star wars" movie 51. most populous state 52. turkeys and thanksgiving 53. simple mousetrap 54. solar food dryer 55. raising sheep 56. identity theft 57. when give back money 58. carbon trading 59. personal bankruptcy 60. when newspapers lie 61. pilots' pension 62. strengthening the agency 63. "most powerful woman in business" 64. top the fortune 500 65. nyse for electronic 66. investigate competition 67. the great crash 68. boeing and airbus 69. sears and kmart 70. holiday shopping 附錄: 參考答案
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