单项选择题
Questions 6 to 10 are based on an interview. At the end of the interview you will be given 15 seconds to answer each of the following five questions. Now listen to the interview.
A.clothes. B.age. C.physique. D.appearance.
A.gradual. B.slow. C.periodic. D.radical.
A.no actual figure of addicts has been reported. B.no scientific studies have yielded effective solutions. C.both affect all sectors of society. D.both cause serious mental health problems.