Most air pollution is caused by the burning of like coal, gas and oil.
A. fuels
B. articles
C. goods
D. products
网友回答
(答案→)A. fuels
B. articles
C. goods
D. products
解析：该题考查考生对题干中句子含义的理解以及对选项中名词含义的理解。由题干中的”coal, gas, oil”可知都是燃料，故正确答案为A。B 项为“物品” C项为“货物，商品”D项为“产品”。