题目内容：

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。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），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.每处错误及其修改均限一词。

2.只允许修改10处，多者（从第11处起）不计分。

Recently, there has been an activity of “Doing Your Bit for an Energy-saved society” in our school. Our schoolmates were highly concerned about the increasing lack for energy and provide advice. Many a student suggest that we shouldn’t waste any food or paper, though they appear very easily to get. Some other students think that advisable to refuse to use plastic bags. It is also strongly recommended those used textbooks not be thrown away and be recycled. After all, most of them are still in a good condition, At last, we all believe we can do more to contribute to build a better world.