It is important to do with the rubbish in cities. Rubbish must be 1.____________
treated properly. Thus, it may cause a lot of problems. It may pollute 2.____________
the air and water. When people breathe the polluted air or drink polluted 3.____________
water, we may get ill. Our city has begun to pay attention to the roblem. 4.____________
As far as I know, some rubbish is sorted and sent to different factory. 5.____________
Rubbish, such as old newspapers and glass, are recycled. Some harmful 6.____________
rubbish is sent to a certain place and buried. Waste air is cleaned after it 7.____________
goes into the air. Waste water is treated before it poured into rivers. To 8.____________
protect from the environment, the government has passed laws to 9.____________
prevent people from throwing rubbish everywhere. We should do our 10.___________
best to take good care of the environment and fight against pollution.
1. 把do改为deal。do with表示“处理”只能用于与what连用的疑问句中，否则，它是“需要、想要、忍受”之意(常与can, could连用)。
2. 把thus改为otherwise。前后不是因果关系，而是“否则”“如果不处理好的话，就会…”。
3. 在drink后加the。the polluted air与the polluted air是并列关系，特指前句提到的那些被污染了的空气和水。
4. 把we改为they。因为替代的是前面的people。
5. 把factory改为factories。不同的工厂，当然不只一家。
6. 把are改为is。因为主语是rubbish，是单数，当然用is。
7. 把after改为before。由前后意义的逻辑关系所知。
8. 在poured前面加is。因为it(waste water)与pour(倒)是被动关系。
9. 去掉protect后面的from。protect本身是及物动词，protect…from…意为“保护…免受…”。
10. 此行正确。
同上