Passage one

46.C? interactive television is successful

47.C? somewhat doubtful

48.C? it has placed TV advertising

49.B? it has down well in engaging the viewer

50.A? they maybe due the novel way of advertising

Passage two

51. B? insufficient demand

52. D? groundless

53. A? the booming defense industry

54. A? powerful opposition to government

55. C? to show urgent need for the government to take action