单项选择题

The main concern of the passage is with ______.

A．city congestion
B．city planning
C．decentralization
D．land values in cities
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单项选择题
We know from the first paragraph that people in old times ______.
A．were more enthusiastic about the development of science and technology
B．had a stronger sense of beauty
C．over-dependent on labor saving devices
D．paid more attention to material benefits
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