40. Although the hazards of space travel are many, the rewards made it a worthwhile .A.endeavorB.expenditureC.executionD.expedition

　　41. He stubbornly her relationship with other people.A.prevailedB.prohibitedC.hinderedD.forbade

　　42. While both plans were perfectly sensible, only one seemed in China's particular situation.A.usefulB.availableC.feasibleD.desirable

　　43. Jones and Edwards are, the producer and direct or of the famous movie.A.alternativelyB.respectivelyC.respectfullyD.respectably

　　44. Experiments enable young scientists to judge what must be accepted and what must be viewed with .A.beliefB.curiosityC.suspicionD.doubt

　　45. From ancient times, the valley of the Nile has been made by the river floods.A.famousB.desertedC.attractiveD.fertile

　　46. People view the public school system, as an educational ladder, from elementary school to high school and finally college undergraduate and graduate programs.A.arisingB.raisingC.originatingD.initiating

　　47. The audience disliked the film thoroughly and were by whistling and stamping the feet.A.protectingB.protestingC.refusingD.proposing

　　48. She prefers to have her left photographed, she says that's her better side.A.veilB.profileC.fringeD.view

　　49. The magician picked several persons from the audience and asked them to help him with the performance.A.by accidentB.at randomC.on occasionD.on average

　　50. So many people turned out for the meeting that there were not enough seats to them all.A.countB.accountC.accommodateD.delegate
　答案：

　　1.分析与解答：文章首末段呼应点题，故答案应选D

　　2.分析与解答：文章第四段首句便提到了工作普及的三点原因，没有提到C，所以选项应为C。

　　3.分析与解答：根据第三段第二句话“The industrial age nay mow becoming to an end, and some of the changes in work patterns which it brought may have to be reversed。”可排除选项D；根据第四段可知两个结果发生在不同时期，所以可以排除C；根据第五段第二句话可以排除B；根据第一段内容可推出选项应为A。

　　4.分析与解答：此词出现在第三段第三句话。通过第四句话“但实际上它可以为工作提供一个更好的前景。”中的转折含义可以断定最接近的词义应为A。

　　5.分析与解答：文章第三段提出了解决办法，故选B。

　　6.分析与解答：答案为B，细节题。第一段作者明确指出：“Primary emphasis is on physical principles and problem-solving; historical background and specialized practical applications have been given a place of secondary importance”，可见B)为正确答案。而A)和D)不全面；C)只是书中的内容而不是重点

　　7.分析与解答：答案为A，细节题。第二段指出：新版有“a number of changes that should enhance the book's usefulness”，由此可见A)为正确答案。而B)未提及；C)和D)与原文第二段第一句相矛盾。

　　8.分析与解答：答案为D，细节题。A)，B)和C)均未在文中提及。根据第三段第一句话“The textbook is adaptable to a wide variety of course outlines”，我们可以看出D)为正确答案。