Significant legal advances have been made towards safer driving in the past few years. Safety standards for vehicle have been raised both at the point of manufacture and through periodic road-worthiness inspections. 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 pose a threat to those with whom they share the road.

　　62. The word massacre in line 3 paragraph one means _____

　　A) mass-killing.

　　B) disaster.

　　C) tragedy.

　　D) accident.

　　63. What is the author s main purpose in writing the passage?

　　A) To show that the motor vehicle is a very dangerous invention.

　　B) To promote understanding between careless drivers and street walkers.

　　C) To discuss traffic problems and propose possible solutions.

　　D) To warn drivers of the importance of safe driving.

　　64. According to the passage, traffic accidents may be regarded as a social problem because _____.

　　A) autos have become most destructive to mankind

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