It is important to do with the rubbish in cities. Rubbish must be 1.treated properly. Thus

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)。