单项选择题

This passage is concerned mostly with ________.

A．the free enterprise system in America
B．the difficulty of living on a fixed income
C．innovative techniques in food processing
D．the advances of advertising techniques
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单项选择题
The author implies that ________.
A．products are more expensive in the U.S. than anywhere else
B．credit cards are often used illegally
C．products very often do not perform as advertised
D．most Americans like to buy what they cannot afford
单项选择题
The joke about doctors implies that, in the eyes of nurses, they are ________.
A．impolite to new arrivals
B．very conscious of their godlike role
C．entitled to some-privileges
D．very busy even during lunch hours
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