B) It may create more problems than it might solve.
C) It is a waste of money because a collision of asteroids with Earth is very unlikely.
D) Further research should be done before it is proved applicable.
[答案及分析]：［B］文章最后一段道出了人们的担忧。正如纽约时报的一篇文章所言：“人们对巨石的担心，还不如对用以对付它们的巨型核舰队的担心更甚。”
24. We can conclude from the passage that .
A) while pushing asteroids off course nuclear weapons would destroy the world
B) asteroids racing across the night sky are likely to hit Earth in the near future
C) the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D) workable solutions still have to be found to prevent a collision of asteroids with Earth.
[答案及分析]：［D］本文虽然提到了用核武器对付小行星的建议，但同时指出人们对这种解决方法担心重重，可见，可行的解决方法仍在寻找之中。
25. Which of the following best describes the author's tone in this pass age
A) Optimistic. B) Critical. C) Objective. D) Arbitrary. [答案及分析]：［C］本文在引述观点及例证时，用了不少间接引语或直接引语，说明出处或原述者。可见本文是一篇对事实情况的客观报道。
2. Passage Two
Believe it or not，optical illusion (错觉) can cut highway is a case in has reduced automobile crashes on some roads by nearly 75 percent using a simple optical stripes，called chevrons (人字形)painted on the roads make drivers think that
they are d riving faster than they really are，and thus drivers slow the American Association Foundation for Traffic Safety in Washington planning to rep eat Japan's next year,the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway speed plays a major role role in as much as one fifth of all fatal traffic accidents,according to the foundation .To help reduce those accidents，the foundation will conduct its tests in areas where speed - related hazards are the greatest - curves，exit slopes，traffic circles，and studies suggest that straight，horizontal bars painted across roads can initially cut the average speed of drivers in ，traffic often returns to full speed within months as drivers become used to seeing the painted ，scientists say，not only give drivers the impress ion that they are driving faster than they really are but also make a lane appear to be result is a longer lasting reduction in highway speed and the number of traffic accidents.
26. The passage mainly discusses . A) a new way of highway speed control
B) a new pattern for painting highways C) a new approach to training drivers D) a new type of optical illusion
[答案及分析]：［A］通读全文可知本文主旨是：如何通过在路面上涂上类似“人字形”的标志来降低车速以减少交通事故。
27. On roads painted with chevrons drivers tend to feel that. A) they should avoid speed - related hazards B) they are driving in the wrong lane C) they should slow down their speed D) they are approaching the speed limit
[答案及分析]：［C］文章第二段第二句说“在路面上涂了人字形线，司机会觉得车速会比实际的快些，于是不自觉的降低车速”。
28. The advantage of chevrons over straight，horizontal bars is that the former . A) can keep drivers awake
B) can cut road accidents in half
C) will have a longer effect on drivers D) will look more attractive
[答案及分析]：［C］本文倒数第二段指出水平线相对于人字形的缺点是：司机很快就会适应水平线，而又提高车速。
29. The American Association Foundation for Traffic Safety plans to .
A) try out the Japanese method in certain areas B) change the road signs across the country
C) replace straight，horizontal bars with chevrons D) repeat the Japanese road patterns
[答案及分析]：［A］本文第二段说美国汽车协会计划效仿日本的成功实践，及在全国选择一些路面涂上人字形及其它符号，以测试它们是否能减少交通事故。
30. What does the author say about straight，horizontal bars painted acr oss roads
A) They are falling out of use in the United States.
B) They tend to be ignored by drivers in a short period of time.
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