短文改错（共10小题;每小题1分，满分10分）
此题要求改正所给短文中的错误。对标有题号的每一行作出判断：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：
该行多一个词：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。
该行缺一个词：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。
该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
Dear editor,
I am a high school student. I have problem to ask              66._________
you for help. A few days before, one of my very good            67._________
friend told me that he was going to leave school.                68._________
He said that he wanted to start his own’s business. I tried          69._________
my best to get him to change his mind, and I failed.              70._________
I realize it is difficult of me to persuade him. He                 71._________
is not doing so good in his studies. The process is                72._________
more important than the result. Now there are only               73._________
90 days being left before the test. I am not sure                  74._________
his decision is right or wrong. I needed your advice.             75._________
Gao Fei