假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改仅限一词。
2. 只允许修改10处，多者（从第11处起）不计分。
A few days ago, I went to the railway station to see my friend away. On the way I saw some street cleaners burning garbages. I know they are trying to get rid of rubbish in a way that they thought was “taking a shortcut”. I don’t think, therefore, it’s proper to clear away rubbish by such a means.
Burning things do harm to people. It’s known to all that burning rubbish will give off poisonous smoke and dust which in turn will pollute air. Many people catch cancer as result of breathing the polluting air. Some people even die from taking in them.
There are many things in rubbish what can be rotten, such as dry leaves, leftover food, etc. They can make into very good fertilizer. So it’s better to collect them for cropland.
答案：
改错
A few days ago, I went to the railway station to see my friend off. On the way I saw some street cleaners burning garbage. I know they were trying to get rid of rubbish in a way that they thought was “taking a shortcut”. I don’t think, however, it’s proper to clear away rubbish by such a means.
Burning things does harm to people. It’s known to all that burning rubbish will give off poisonous smoke and dust which in turn will pollute air. Many people catch cancer as a result of breathing the polluted air. Some people even die from taking in it.
There are many things in rubbish that/which can be rotten, such as dry leaves, leftover food, etc. They can make very good fertilizer. So it’s better to collect them for cropland.