1 . 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。

It can be seen from the picture Mr. Liu，who wears a mask. was walking his dog. Interestingly，his dog which also wears a mask.

In recent year，air pollution has become more and more serious in some areas，which have led to severe consequences. To solve this problem，firstly of all，we should raise the public awareness of protecting the environment. Secondly，the government ought to punish the illegal acts as polluting the environment severe. Thirdly，we must do our best to protecting the environment in our daily life. Only in this way can human beings and animals share a pleasant planet or live a happy life.