题目内容
语法填空
阅读下面材料,在空格处填入适当的内容(1个单词)或括号内单词的正确形式。
Using Garbage as a Fuel
Garbage can be a good fuel to use. The things in garbage do not look 1. 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 2. energy source. Burning garbage 3. ( be) not a new idea. Some cities in Europe and the United States 4. (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 5. ( build). In Paris, France, some power plants burn almost 2 million metric tons of the city’s garbage each year. The amount of energy 6. (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 7. (easy) , such as food and paper, must be separated from metals, glass, and other materials 8. do not. Another problem is that burning garbage can pollute the air. Our fossil fuel supplies are 9. (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 10. (pile) up on the earth.