单项选择题

A．It is being forced out of the entertainment industry.
B．It should change its concept of operation.
C．It should revolutionize its technology.
D．It is a very good place to relax.
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The water (or snow) can become acidified when a pollutant combines with_________in the air.
填空题
city dwellers tend to use various strategies to try and reduce the pressures upon themselves:
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