听力原文： The non-medical use of certain drugs is forbidden in the United States because they can be dangerous. Many Americans, however, still use drugs illegally without a doctor's permission. In fact, taking drugs has become one of America's most serious social problems.
In America, most people who have become dependent on drugs are young. Why are young people the most frequent users of drugs？ The answers are varied. Some young people feel depressed and nervous in a society full of tension and they want to find a means of escape. Others are bored and they think the drug makes their time pass more pleasantly.
Taking drugs can cause only poverty and despair. When a person takes the drug, however, he forgets his misery. The drug takes away the stress and strain of living—until the effect of the drug wears off. Then, the discomfort is very intense and terrible. Because he must. take larger and larger doses, his habit becomes more and more expensive. Such people often turn to crime to get the money they need. They might break in and steal money and other valuable things or rob banks. In this way, taking drugs forces the crime rate up.
In the United States drugs have destroyed many of the young people's minds and ruined their bodies. So it is necessary that a campaign to forbid taking drugs be launched in the United States and other countries.
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A. The housing problem in the U.S.
B. The problem of taking drags in the U.S.
C. The problem of unemployment in China.
D. The problem of the workers' strikes in England.