假定英语课上老师要求同桌之间交换修改作文， 请你修改你同桌的以下人作文。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（从每11处起）不计分。
When I was ten years old, I went to Yangzhou with two American．I became their guide．First, we went to the Shouxi River．They wanted to look around the river by the boat．After buy the tickets, we got into the boat．We went around seeing the beautiful sight．After that, we went shopping．The sellers couldn't spoke English．Though it was very harder, I tried my best listen to their words carefully and translate the sentences．They bought some little things with their help．Next, we went to a small zoo but took some pictures．When we felt hunger, we went out and had lunch．After lunch, we visited some old house and learned more about Chinese history．