It is a big job to take away a city’s rubbish. Most rubbish is made up of things we can’t eat or use. If we kept these things, we would soon have mountains of rubbish.
In some cities the rubbish is collected and taken outside of the city to a dump. Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathrooms and other places.
To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you’d never know that this was an old rubbish dump before.
In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly changes into something called humus, which looks like black earth. It is rich with kinds of things that feed plants and help to make them grow.
【小题1】The best title of the passage is .| A．Need of Rubbish Collection |
| B．Different Ways to Treat Rubbish |
| C．Reuse Rubbish |
| D．Rubbish, a Big Job |
| A．health | B．pollution | C．washing | D．rubbish |
| A．a history book | B．a TV guide | C．a science book | D．a telephone book |
