四、短文改错（满分10分）
假如英语课上老师要求同学们交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧）, 并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
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。
My parents and I went to the park on last Sunday. There were lots of visitors stood in front of the ticket window. We waited a long time and buy three tickets. In the Tiger Mountain of the park, I was too eager to see the fierce frightened animals that I quickened my steps through the crowd. Unfortunate, I got separated from my parents. I had hard time looking for him, but I had no luck. Wandering in the park, I felt alone without any companions. Worse still, I had no money, so I had to walk home, covered as much as 5 kilometers.