题目内容

Most air pollution is caused by the burning of ____ like coal, gas and oil.

A. fuels
B. articles
C. goods
D. products

试题答案

A
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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>>