问题描述：
英语改错,共10处,每句中最多有两处,涉及一个单词的增加、删除或修改.
Welcome to our English Corner.It set up four years before.Since then many high school students have joined in it.Students from different school gather round here every Sunday morning,and there are also some college students or foreigners.We talked about everything We are interested in.We also exchange our effective ecperience in English study.We think we have learned much here.It is a really addition to our English class and it is popular in students.And it is supporting by parents and teachers.They all believe it is in great help to students.If you want to know much about it,you may talk to the students here.
Welcome to our English Corner.It set up four years before.Since then many high school students have joined in it.Students from different school gather round here every Sunday morning,and there are also some college students or foreigners.We talked about everything We are interested in.We also exchange our effective ecperience in English study.We think we have learned much here.It is a really addition to our English class and it is popular in students.And it is supporting by parents and teachers.They all believe it is in great help to students.If you want to know much about it,you may talk to the students here.
问题解答：
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