单项选择题

A．how
B．when
C．why
D．where
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单项选择题
A．its being multinational.B．its simultaneous operation.C．its major role of heroin supplier.D．its major role of cocaine supplier.
A．its being multinational.
B．its simultaneous operation.
C．its major role of heroin supplier.
D．its major role of cocaine supplier.
单项选择题
A．US Customs Service.B．Russia’s nuclear programme.C．US Department of Commerce.D．Russia’s non-military labs.
A．US Customs Service.
B．Russia’s nuclear programme.
C．US Department of Commerce.
D．Russia’s non-military labs.
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