单项选择题

Questions 9 and 10 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now listen to the news. We can infer from the news that ______ of teenagers under survey in 1993 were drug users.

A．28%
B．22%
C．25%
D．21%

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单项选择题

单项选择题

Questions 9 and 10 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now listen to the news. We can infer from the news that ______ of teenagers under survey in 1993 were drug users. 您的浏览器不支持 audio 元素。