A
In the long history of human society, the motor vehicle (车辆) has killed and disabled more people than any bomb or weapon ever invented. Many of the accidents on the streets are mainly from bad behavior of drivers who refuses to respect the legal and moral(道德的) rights of others. So the killing on the road may be regarded as a social problem.
As a matter of fact, the enemies of society on wheels are rather harmless people who just act carelessly, you might say. But it is a principle both of law and common morality that carelessness is no excuse when one's actions could bring damage to others.
It's reported that the psychological condition of the driver can account for as many as 80 percent of all automobile accidents. Emotional upsets can affect drivers' reactions, slow their judgment, and blind them to dangers that might otherwise be clear. The experts warn that it is important for every driver to make an effort to keep one's emotions under control.
While the irresponsibility that led to much of the problem is not limited to drivers, street walkers regularly break traffic rules, and they are at fault in most vehicle-walker accidents; many cyclists even believe that they are not required to follow the basic rules of the road.
Important legal advances have been made towards safer driving in the past few years. Safety standards for vehicle have been raised. In addition, speed limits have been lowered. Due to these measures, the accident rate has decreased. But the accident experts still worry because there has been little or no improvement in the way drivers behave. The only real and lasting solution, say the experts, is to convince people that driving is a skilled task requiring constant care and concentration. Those who fail to do all these things present a threat to those with whom they share the road.
21. The passage is written ______
A. To show that the motor vehicle is a very dangerous invention.
B. To discuss traffic problems and suggest possible solutions.
C. To promote understanding between careless drivers and street walkers.
D. To warn drivers of the importance of safe driving.
22. What is the purpose of mentioning the psychological condition of the driver in paragraph 3 ?
A. To show an example of the various reasons for road accidents.
B. To show how important it is for drivers to be emotionally healthy.
C. To show some of the inaccurate opinions by researchers.
D. To show the reason why people need the guidance from experts while driving.
23. Who are NOT mentioned as being responsible for the road accidents?
A. Careless bicycle-riders.
B. Mindless people walking in the street.
C. Irresponsible drivers.
D. Irresponsible vehicle makers.
