Most air pollution is caused by the burning of like coal gas and oil. A. fuelsB. articl

问题补充：

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

A. fuels

B. articles

C. goods

D. products

答案：

(答案→)A. fuels

B. articles

C. goods

D. products

解析：

A。根据空格后的like coal, gas and oil可知，此题应填fuels，因为coal, gas, oil均属于fuel。