假定英语课上老师要求同桌之间交换修改作文，请你修改你同旧式写的一下作文。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：在缺词处加一个漏字符号，

假定英语课上老师要求同桌之间交换修改作文，请你修改你同旧式写的一下作文。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：在缺词处加一个漏字符号，并在其下面写出该加的词。
删除：把多余的词作斜线（\）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。
Dear Robert,
Thank for your letter of May 12th. How glad I was when I get it. I’d
be very happy to be your pen friends. Now allow me introduce myself to
you. I’m a boy student aging seventeen, study in Senior Three of Hongqi
High School. I’m a monitor of my class. I am about to take National
Matriculation Entrance Examination after twenty days, that is,
between June 7 and 8．You know. I want very much to be a doctor working
for poor peasants that I try to make fully use of every hour
and study far into the night every day.
Best wishes！
Yours truly
Dear Robert,
Thank for your letter of May 12th. How glad I was when I get it. I’d
Thanks 或for 前加you                        got
be very happy to be your pen friends. Now allow me ∧introduce myself to
             friend               to
you. I’m a boy student aging seventeen, study in Senior Three of Hongqi
aged          studying
High School. I’m a monitor of my class. I am about to take National
∕                      
Matriculation Entrance Examination after twenty days, that is,
in
between June 7 and 8．You know. I want very much to be a doctor working
so
for poor peasants that I try to make fully use of every hour
full
and study far into the night every day.
Best wishes！
Yours truly