单项选择题

Staples( in the third paragraph) are commodities ______.

A．that people are in constant need of
B．that people do not really want
C．that people want but don' t need
D．that are convenient to purchase
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单项选择题
Unsought goods ______.
A．have to be new
B．have to be standardized
C．have to be promoted
D．have to be sent to consumers' homes
单项选择题
A word processor can be looked on as satisfying a need rather than a want if ______.
A．it is used at home to do paper work
B．it is used by a writer to type a novel
C．it becomes the only means to an end
D．a writer does not want to use it
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