22. D) Hostess of the weekly Business World。
23) B) He and his wife did everything by themselves。
24. A) He hardly needs to do any advertising nowadays。
25. B) The restaurant atmosphere。
26. C) There are various ways to protect it。
27. C) It can lead to the loss of vision in children。
28. D) It can only be partly accomplished now。
29. D) They have jobs and other commitments。
30. A) They dont want to use up all their life savings。
31. D) Make full use of community facilities。
32. A) Health and safety conditions in the workplace。
33. A) Replace its out-dated equipments。
34. A) They requested to transfer to a safer department。
35. C) To protect against the poor working conditions。
36. survive
37. distant
38. backwards
39. discovered
40. scientific
41. motion
42. predicted
43. introduced
44. that move at the speed greater than light, and therefore might serve as a passport to the past
45.seems to have been part of humanity for as long as human have existed
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