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。每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（从第11处起）不计分。
21世纪教育
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．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分。
Hello, everyone! I would like to share with you my first travel abroad. Last summer vacation, I, together with several classmates, took part an exchange program with the American school. During our visit, I stayed in host families, that gave us an opportunity to learn about American society. The main part of our program was to experience of the school life. Comparing with Chinese students, American students are more open and active. Besides, they have less homeworks and fewer exams. So we also have a lot in common, like being crazy about NB
| A．When the visit was over, I make friends with some American students, who became very interested in Chinese culture. The American students also benefited many from the program. |
