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．作文中共有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．Dearsir，I'mg

Question

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．作文中共有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．
Dear sir，
    I'm glad to recommend （推荐） to you my friend Li Ming．
Li Ming was born on July 15，in 1974 in Beijing．（71）___He graduated from Xisi Primary School in 1986．（72）___When he was in the middle school，he did good in maths，（73）___physics and chemistry and fond of art．After graduating　（74）___from No.4 High School，he entered into Beijing（75）___University study physics．After four years of hard　（76）___work there，he went to the United States for farther（77）___study．Because of his excellent work，he get a doctor's （78）___degree in physics this year．He is now in good health but would like to make contributions to our（79）___ountry．I should be most grateful you would
favorably consider my recommendation．Looking forward to receive your early reply　　（80）___
Yours truly，
Wang Lin．

Answer 1

Dear sir，    I'm glad to recommend （推荐） to you my friend Li Ming．Li Ming was born on July 15，in 1974 in Beijing．（71）He graduated from Xisi Primary School in 1986．（...