题目内容：

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。

Last week, my English teacher let us did some research on “How to study English well”, She asked us to form a small group, that was made up with five students. In my group, there are three girls and two boys. I suggested we each play different role in it. Then I prepared the questions, and the rest of my group collected students’ answer. Because we worked as a team, so the research went very good and ended within two hours. The teacher praised me group, and I learned the important of cooperation（合作）.