题目内容
阅读理解填词：
Taking away a city’s rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can’t eat or use. If we kept these things, we would soon have a mountain of rubbish.
In some cities the rubbish is c1. and taken outside of city to a dump (垃圾场). Often the city dump is placed where the ground is l2. or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the rubbish system. The system takes away the u3. water from toilets, bathtubs and other places.
To keep mice and flies away, some earth is used to c4. the newly dumped rubbish. Later, grass may be p5. on the rubbished-filled land. F6., a house or garden may be built there, and then you’d never know that this had once been an old rubbish dump.
In o7. cities, the rubbish is burnt in special places. The fire burns e8. except the metal (金属). Sometimes the metal can be used again in f9. where things are made of metal. The food parts of rubbish are put in special piles where they slowly change i10. something called humus (腐殖质), which looks like black earth. It is rich with the kinds of things that feed plants and help make them grow.
