摘要：34．Most air pollution is caused by the burning of like coal, gas and oil. A．fuels B．cars C．goods D．products
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Most air pollution is caused by the burning of _________ like coal, gas and oil.
A. fuels B. articles
C. goods D. products
查看习题详情和答案>>Most air pollution is caused by the burning of ____ like coal, gas and oil.
A. fuels B. articles C. goods D. products
查看习题详情和答案>>Most air pollution is caused by the burning of _________ like coal, gas and oil.
A. fuels B. articles
C. goods D. products
查看习题详情和答案>>