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

　　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．

　　A survey basing on 1，000students found that half of the pupils and 80% of the middle school students sleeps less than nine hours every night．Too many homework given by school teachers and parents is the main reasons．Other reason lies in students'bad habits．Some students，for example，are absent-minded while doing his homework，and some waste their after-class time．The third reason is because some students have to get up early on weekdays to get school far away from home．Experts are calling at schools and parents to cut down on the amount of homework．And students should make a good use of their time．And it would be better if they could choose to study in a nearby school．