短文改错（共10小题；每小题1分，满分10分）
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处语言错误，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—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，并在其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。
Yesterday afternoon our school invites Professor Li from Beijing University to give us, Senior 3 students, report. Professor Li is engaged in psychology, whose report were about how to prepare the lessons scientifically for the National College Entrance Examination.
On his report he emphasized the importance of a good habit of study and rest. And meanwhile she replied to some questions from both teachers or students.
As for me, what Professor Li said is very much to the point. Recent, I have always been felt a headache, unable to concentrate on classes. In fact, I often stayed up very late to do plenty of exercises. Because of more sleep and rest, I couldn't take my lessons effectively. Thanks to Professor Li, I am getting to know that how to prepare well for the examination in future.