短文改错
假如英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处语言错误，每句中最多有两处；每处错误仅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—横线，并在该下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从第11处起）不计分。
As is well know, when senior students graduate from school, most of their textbooks are thrown away , that are still in good condition. What waste of it ! I quite agree to the suggestion that we should recycle these textbooks. For one thing, recycling textbooks can save a lot of nature materials, which are used to making textbooks. For other, senior students may have plenty of usefulnotes on the pages. They are very helpful to those textbooks users. However, the cost of the books will unload some burden of the families of the students. Actually in Australia and some other countries, recycling textbooks are popular and that it gives us a good example. Why can’t they have a try?