短文改错（共10小题；每小题1分，满分10分）
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。文中共有10处语言错误，每句中最多有两赴，每处错误仅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（八），并在其下面写出该加的词。
删除：把多余的词用斜线（＼）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限一词。
2．只允许修改10处，多者（从第11处起）不计分。
As a proverb goes, “Preparedness ensures success and unpreparedness spells failure”. It can’t be denied whethergood preparation is one of the essentials of success.
The first two years of my junior middleschool life went sosmoothly and I got verygood grades in every exam that I took it for granted that I amsure to be admitted by a key high school. However，in my junior three, I began totally loosening myself up and no longer focused on study. It is no accident that my academic performance declined sharp. Until the last month of my junior three did I realize it and concentratedon learning again. However, it was too late to make full preparationforthen— I failed in the senior high school entrance examination.
From my experience, I see that at no time weshould ignore the importance of making good preparation, and that success belongs to those whomcan suffer long years of patient toil and constant efforts.