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。

Li Dan was trying to wake up from her sleep. She sat up slow, yawning with her eyes closed. Though she knew that she would be later for the ballet lesson if she did not hurry up, but she was still very sleepy. She falls back on the bed and went back to asleep. She even began to dream, and in her dream, she was dancing.  She became a elegant swan in Tchaikovsky's ballet, Swan Lake. Then his mother came into the room. Annoying to see Li Dan still sleeping, she said in a loud voices, “Li Dan, get up!” Li Dan struggled to get out of bed. At last, after a quick breakfast, Li Dan left her ballet lesson.