Waste paper should be throun every were,It's our duty to keep our city clean

问题描述:

Waste paper should be throun every were,It's our duty to keep our city clean

废纸应被到处扔.保持城市的清洁是我们共同的责任.这里的第一句应该少了个not吧 这样就是
废纸不应随手乱扔.保持城市的清洁是我们共同的责任.