单项选择题

Many producing countries ______.

A．have become consuming countries
B．recognize a problem in the spread of AIDS
C．find it easier to control both production and consumption
D．all of the above

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单项选择题

The United Nations Conference was held to discuss ______.

A．ideological and individual differences
B．production
C．drug abuse
D．nations of file world

单项选择题

The United Nations Conference ______.

A．was not as intense as previous meetings
B．failed to recognize drug problems in many countries
C．was successful in developing a two-level action plan
D．showed governments' confidence in handling their own problems independently