单项选择题

A．average
B．unaffected
C．normal
D．commonplace
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单项选择题
A．fableB．titleC．nameD．brand
A．fable
B．title
C．name
D．brand
单项选择题
All of the following are solutions employed to prevent noise pollution EXCEPT ______.
A．utilizing insulation and sound proofing devices
B．reducing the sources of noises
C．wearing ear protection
D．planting more trees to absorb the noise
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