单项选择题

Consumers will not benefit from advertising until it becomes successful.

A．and the producer lowers the price
B．with mass production.
C．before a new market has been created.
D．or the manufacturer has recovered the cost.
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单项选择题
Which of the following can best characterize the US
A．It has stopped demanding reforms.
B．Its management is inefficient.
C．It is trying to pay less to WHO.
D．Its government is not responsive.
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