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. 每处错误及其修改仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Jack London was a famous America writer. He was born in January 12th, 1876, in San Francisco. His family was very poor, so Jack had to leave for school to make money. He worked hard in much difficult jobs. Later Jack returned school, but he didn't stay. He wrote, “Life and pocket book were all too short.” In 1887, he went to Alaska to find out gold. He returned home and started to write. His writings were successfully, and he became rich and famous. Jack was no a happy man, however. In poor health, he took off her own life in 1926.
