单项选择题
A. rolled up B. gone up C. sat up D. taken up
A.It mainly affects males. B. It may cause drug addiction. C. It is a mental problem. D. It is hard to detect.
A.is less likely to get financial aid to go to university B. is more likely to choose vocational education C. may think learning for pleasure is a good idea D. may choose to study for a professional degree