Questions 18 to 20 are based on the following passage.
At the end of the passage, you will be given 15 seconds to answer the
questions. Now listen to the passage. Why can middle-aged and old people have an easy access to drugs
A．Drugs are covered by their social welfare. B．Drugs are covered by their medical care. C．They rely on drugs to kill their pains. D．They usually have money for drugs.