题型：语法填空（语篇） 题类：常考题 难易度：普通
广东省三校2015-2016学年高一下学期期末联考英语考试试卷
Using Garbage as a Fuel
Garbage can be a good fuel to use. The things in garbage do not look coal, petroleum, or natural gas, but they are chemically similar to these fossil fuels. As we use up our fossil fuel supplies, we might be able to use garbage as energy source. Burning garbage ( be) not a new idea. Some cities in Europe and the United States (burn) garbage for years. The heat that is produced by burning garbage is used to boil water. The steam that is produced is used to make electricity or to heat nearby ( build). In Paris, France, some power plants burn almost 2 million metric tons of the city's garbage each year. The amount of energy (produce) is about the same as would be produced by burning almost a half million barrels of oil!
But there are problems in using garbage as a fuel. Garbage that burns (easy) , such as food and paper, must be separated from metals, glass, and other materials do not. Another problem is that burning garbage can pollute the air. Our fossil fuel supplies are (limit) . Burning garbage might be one kind of energy source that we can use to help meet our energy needs. This method could also reduce the amount of garbage (pile) up on the earth.
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