单项选择题

A．That drugs should not be used without doctors advice.
B．That drugs and substances are different.
C．That substances should be used in a scientific way.
D．That the misuse of substances is harmful.
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单项选择题
A．Entertainment.B．Studying in a local college.C．Seeking physical fitness.D．Finding peace and quiet.
A．Entertainment.
B．Studying in a local college.
C．Seeking physical fitness.
D．Finding peace and quiet.
单项选择题
A．Most people don’t think it is a serious problem.B．Most of our pollution is caused by things people need.C．The government has not spent enough money to stop it.D．The seriousness of pollution has not been realized by the government.
A．Most people don’t think it is a serious problem.
B．Most of our pollution is caused by things people need.
C．The government has not spent enough money to stop it.
D．The seriousness of pollution has not been realized by the government.
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