A
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11处起)不计分。
(2020·河北石家庄市高三一模)
Nowadays more and more students attend different kind of training classes or hire tutors to improve their grades at weekends.
Some of the students think that necessary to do so.Firstly, it’s more effective to study under a teacher’s help than by themselves.Secondly, students can make up for that they miss or fail to understand in class on weekdays.Besides, they can have more chances and time communicate with teachers.
Therefore, others don’t think so.For one thing, the students can easily develop the habit of dependence, causing some students not to listen attentive in their regular classes.For another, students needed time for rest and recreation at weekends.What’s worse, attend training classes means costing them much money.
