Twenty states have raised the legal drinking to 21, reversing a trend in the 1960s to reduce it to 18. After New Jersey lowered it to 18, the number of people killed by 18 to 20­year­old drivers more than doubled, so the state recently upped it back to 21.

　　Reformers, however, fear raising the drinking age will have little effect unless accompanied by educational programs to help young people to develop “responsible attitudes” about drinking and teach them to resist (抵抗) pressure to drink.

　　Tough new laws have led to increased arrests and tests and, in many areas already, to a marked decline in fatalities (灾祸). Some states are also penalizing (处罚) bars for serving customers too many drinks. A tavern in Massachusetts was fined for serving six or more double brandies to a customer who was “obviously intosxicated (喝醉的)” and later drove off the road, killing a nine­year­old boy.

　　As the fatalities continue to occur daily in every state, some Americans are even beginning to speak well of the 13 years of national prohibition (禁止) of alcohol that began in 1919, what President Hover called the “noble experiment”. They forget that legal prohibition didn't stop drinking, but encouraged political corruption (腐败) and organized crime. As with the booming drug trade generally, there is no easy solution.

　　1．Drunken driving has become a major problem in America because ________.

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