短文改错
英语课上，老师要求同桌同学相互修改作文。假设以下书信为你同桌所写，请你对其进行修改。文中共有10处错误，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。
Mary is a 16-year-old high school student, who devoted herself to her lessons every day. Last Saturday, as usual, she went to several class. In the evening, she continued to study until deeply into night. She was too sleepy and tired that she couldn’t work effectively. On the Sunday morning, she was about to do her lessons while her father came up and advised her to take a break. Soon they came up a good idea. We decided to go cycling in the countryside. Mary had great fun, competing and chatting with her father, and felt relaxing in the open air. On Monday, Mary was energetic but active in class.