What would you do if a stranger gave you some medicine and he said it would keep you slim or help
 you do well in exams? Would you take it?
     Many middle school students have learned to keep themselves safe by saying "no". __1__ Drugs are
 dangerous to your health!
    Because most of teens don't know much about drugs, they might want to try them. Liu, 16, was a good
  student before trying drugs. __2__  He decided to have a try. After taking drugs only once, he found it
 very hard to stop. Liu began to spend all his time and money on drugs. Soon, he stopped going to school and started stealing (偷).__3__.    
    In China, taking drugs is becoming a big problem for teens. According to a survey, about one million
 people in China are using illegal drugs now, and about 74% of them are young people.
     __4__     
    Drugs are dangerous. Never try them, even if you're curious! It is the most important for you to keep
 safe and healthy.

A. In the end, he was put in prison. B. In fact, what those strangers want to give them are drugs (毒品). C. What's worse, there are about 10,000 drug users under 16 now. D. One day, some old friends told him it would be fun.