单项选择题

The important relationship between environment and economy is most clearly reflected______.

A．in industry
B．in agriculture
C．in cities
D．in suburbs
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单项选择题
A．loweringB．bringing downC．keeping upD．pushing up
A．lowering
B．bringing down
C．keeping up
D．pushing up
单项选择题
The word congestion (line 2,paragraph 5) might mean______.
A．condition
B．vehicle
C．jam
D．pedestrian
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