题目内容：

文中共有10处语言错误，每句中最多有两处。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（\）划掉。

修改：在错的词下画一横线，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。

As is well-known that birds are our friends. But the large number of birds have been killed for food. The other day I was walking in the woods while a shot was heard. Hearing the shot, the bird in the trees flew to all directions. A bird was injured badly and looked sadly. Finding the bird injured, so I decided to take it home. At home I take good care of it. When it recovered, I returned itself to the woods. I hope something should be done to prevent birds from killed.