单项选择题

In the eighties, the Americans as a whole ______.

A．became richer
B．became poorer
C．lived a poorer life than in the seventies
D．needed more jobs to support their families
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单项选择题
From the last sentence of the second paragraph we learn ______.
A．advertising is no different from person -to- person selling in substance
B．advertising extends sales promotion to a larger area
C．advertising has greatly improved the production of goods
D．it is very expansive to advertise a new product
单项选择题
By saying that the decision is the prospect' s ,the author means ______.
A．advertisement often persuades people to buy what they don' t really want
B．advertisement can never really influence people's ability to decide
C．whether to buy an advertised product is up to the would - be customer
D．the effect of an advertisement on the public is difficult to determine
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