题目内容

听下面一段材料,回答第1-3题。
1. What's one of the biggest problems today?
[     ]
A. Pollution.
B. Population.
C. Poverty.
2. What's the most serious kind of pollution?
[     ]
A. Water pollution.
B. Air pollution.
C. Noise pollution.
3. Why do people become angry more easily today?
[     ]
A. Because of noise pollution.
B. Because of water pollution.
C. Because of air pollution.
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