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. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

Our class organized a environmental protection activity in the park in this morning. When we arrived there, we collected the throwing rubbish, such as waste paper, plastic bag and bottles. We also put up several notices to ask people take care of the plants and trees around us. Besides, we give a speech about the importance of the environment on that we are relying. In my opinion, we should take actively measures to prevent pollution but everyone should make contributions to it. Only by saving the environment can we save us.