请你对下文内容进行修改。文章中共有10处错误，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（∧），并在此符号下面写出该加的词
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
John is a tall man weighing as much as 100 kilogram(公斤). Though he is large, but he fears dogs. One day he was take a walk when a dog suddenly appeared nowhere. He became such nervous that he ran as fast as he could. The dog kept run after him and it was getting closer. In the dangerous situation, John decided climb up a tree to avoid the dog. Unfortunate, it was not a easy job. He hadn’t gone up very high when the dog stood right under the tree. The dog jumped up and bit it’s teeth into his bottom. John fell right onto the dog’s head, that killed it immediately.