题目内容
（请给出正确答案）
[主观题]
听力原文：W: I think air pollution is rather serious in this city.M: You are right. Cars ar
听力原文：W: I think air pollution is rather serious in this city.
M: You are right. Cars are still the major source of the pollution.
Q: What is the serious problem with the city？
(4)
A．Traffic accidents.
B．Economic crisis.
C．Air pollution.
D．Housing, shortage.
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