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。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：在错的词下面画一横线，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。

Yesterday I was walking around the park while I saw some rubbishes left on the ground. People just walk by as if they had not seen it. I thought I would do something differently. I picked up and put it into a nearby dustbin. I was felt nice because I saw someone else doing a same thing as I had just done. I thought my kindness had affected him. Saving the Earth is save us humans. It is a good lesson what we should learn in life and together we can make the Earth a good place to live one step at a time.