As the quality of the city’s air continues to give rise to ______, the residents

题干

As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.

A．descriptions

B．comparison

C．concerns

D．emergency

上一题下一题 0.64难度单项选择更新时间:2013-06-24 08:19:36

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