单项选择题

According to the passage, up to now, anti-drag education ______

A．has made all people see the danger of drugs
B．has succeeded in dissuading people from using drugs
C．has been effective only to a certain degree
D．has proved to be a total failure
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单项选择题
According to the passage, which of the following statements is NOT true
A．Even balanced and reasonable anti-drug persuasion is influential only to some people.
B．Most drug users are ignorant of the danger of drugs.
C．Punishments such as loss of a driver' s license do not seem to be an effective way to stop drunken driving.
D．Primary prevention is a useful principle to be followed in anti-drug education.
单项选择题
In modem Western society, the environmental problem has ______
A．received great attention from the governments
B．caused some serious disorders in technology and economy
C．affected modem technologies more directly than before
D．become more important but received less and less attention
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