Question:
Fill in the blanks.
(a) Coal is one of the………….used to cook food.
(b) When heated in air, coal burns and produces mainly ……….gas.
(c) Coal tar is a black, thick……….with an ………….smell.
(d) Petroleum,…………..and……….. are fossil fuels.
(e) Forests and coal are ……….. natural resources.
Solution:
(a) fuels
(b) carbon dioxide
(c) liquid, unpleasant
(d) coal, natural gas
(e) exhaustible
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