A. butterflies are fond of the tears of Asian cattle

B. scientists have discovered the dinosaur's coloring

C. microscopes can present you with an amazing world

D. man has explored the black hole for thousands of years

24. The main purpose of the passage is to________________.

A. compare features of different books

B. inspire people to become scientists

C. teach children some knowledge of science

D. recommend new science books to children

　　　　　　　　　　　　　　　　B

Last night I was driving from Harrisburg to Lewisburg，distance of about eighty miles. It was late. Several times I got stuck behind a slow-moving truck on a narrow road with a solid white line on my left, and I became increasingly impatient。

At one point along an open road, I came to a crossing with a traffic light. I was alone on the road by now, but as I drove near the light, it turned red and I made a stop. I looked left, right and behind me. Nothing. Not a car, no suggestion of car lamps, but there I sat, waiting for the light to change, the only human being for at least a mile in any direction.

I started wondering why 1 refused to run the light. I was not afraid of being caught because there was clearly no policeman around, and there certainly would have been no danger in going through it.

Much later that night, the question of why I'd stopped for that light came back to me. I think I stopped because it's part of a contract(契约)we all have with each other. It's not only the law, but it is an agreement we have, and we taught each other to honor it: we don't go through red lights.

Trust is our first inclination(倾向). Doubting others does not seem to be natural to us. The whole construction of our society depends on mutual(相互)trust, not distrust. We do what we say we'll do; we show up when we say we'll show up; and we pay when we say we'll pay. We trust each other in these matters, and we're angry or disappointed with the person or organization that breaks the trust we have in them.

I was so proud of myself for stopping for the red light that night.

25. Why did the author get impatient while driving?

A. He was lonely on the road. B. He was slowed down by a truck..

C. He got tired of driving too long. D. He came across too many traffic lights.

26. What was the author's immediate action when the traffic light turned red?

A. Stopping his car B. Driving through it

C. Looking around for other cars. D. Checking out for traffic police.

27. The event made the author strongly believe that ____________.

A. traffic rules may be unnecessary B. doubting others is human nature

C. patience is important to drivers D. a society needs mutual trust