单项选择题
Passage 3 Questions 17 to 20 are based on the passage you have just heard.
A．Polynesian. B．American. C．English. D．Japanese.
A．Changing her clothes. B．driving her car. C．Having a meal. D．Typing an essay
A．to have governmental and school intervention to tackle the drug problem B．to have a dramatic effect of parental warnings on teens’ drug use C．to have drug prevention D．none of the above mentioned