With excitement and amazement, lighter than air flight had been around for more than one hundred years.
<span>1. a) extravagance<span>A
2. A
3. A
4. A,B,E
5. C
6. A
7. D
8. A
9. B
10. D,E
11. C
12. D
13. A
14. A
15. C
16. A
17. B
18. C
19. B
20. A
21. B
22. A, e, f
23. D
24. D
25. A
26. B
27. C
28. C
29. B
30. C, e
31. A
32. C
33. D
34. C
35. B
36. D
37. B
38. B
39. D
40. B
41. B
42. A
43. B,c
44. D
45. C
46. A
47. C
48. C
49. B
50. B</span></span>
