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：在错的词下画一横线，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。

To welcome the coming New Year, our class hold a party last night. Before the party, we decorated the classroom with colorful balloons and flower. Our teachers also came to the party. We sang and danced happy at the party but we enjoyed ourselves so much. All the teachers present gave performances. Our teacher of English sang English song. Guess what! He surprised at us. I had never known that he could sing so well. We applauded loudly after he finished sing the song. We were too excited that we could not fall asleep at night. As a result, all of us is sleepy today. The good news is what we can go home today and will have a two-day holiday.