单项选择题

Questions 26 to 29 are based on the passage you have just heard.

A. Drug use is more serious in high schools than in colleges.
B. Drinking alcohol is not as popular as before.
C. There are more high school students who take drugs.
D. Half high school students have access to drugs.
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单项选择题
A. A billion. B. 450. C. Hundreds of billions. D. Hundreds of millions.
A. A billion.
B. 450.
C. Hundreds of billions.
D. Hundreds of millions.
单项选择题
A. Showing someone around. B. Talking about the school. C. Introducing a speaker.D. Meeting her teacher.
A. Showing someone around.
B. Talking about the school.
C. Introducing a speaker.
D. Meeting her teacher.
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