单选题_____ is the biggest problem in today’s life.AWater pollutionBAir pollutionCNoise pollutionDPollution
单选题
_____ is the biggest problem in today’s life.
A
Water pollution
B
Air pollution
C
Noise pollution
D
Pollution
参考解析
解析：
根据第二段“one of the biggest is pollution”可知，污染是最大的问题。
根据第二段“one of the biggest is pollution”可知，污染是最大的问题。
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