文档介绍：2000年1月大学英语四级(CET-4)真题试卷
Passage One
Unless we spend money to spot and prevent asteroids (小行星) now, one might crash inIt’s still too early to say whether such a collision might occur.
23. What do people think of the suggestion of using nuclear weapons to alter the courses of asteroids?
A) It sounds practical but it may not solve the problem.
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.
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
25. Which of the following best describes the author’s tone in this passage?
A) Optimistic. B) Critical. C) Objective. D) Arbitrary.
Passage Two
Believe it or not, optical illusion (错觉) can cut highway crashes.
Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent stripes, called chevrons (人字形), painted on the ro