短文改错（共10小题；每小题1.5分，满分15分）此题要求改正所给短文中的错误。对标有题号的第一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），

短文改错（共10小题；每小题1.5分，满分15分）
此题要求改正所给短文中的错误。对标有题号的第一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下画一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Dear editor,
I am a high school student. A few days before,                             76    
one of my very good friend told me that he was going                        77    
to stop the school. He said that he wanted to start his                     78    
own business. I tried best to get him to change his mind,                   79    
but I failed.
I know it is difficult of him to change his mind.                          80    
He is not doing so good in his studies, yet I want to                       81    
insist that I give it a try.  The process is more                      82    
important than the results.  Now there are only 60 days                 83    
left before that test. I am not sure that his decision is               84    
right or wrong . I needed your advice.                                  85    76.before改为ago　　77.friends　　78.去掉the　　79.best 前加 my