下文中共有10处错误，每句最多两处，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：删除多余的词用斜线（\）划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改仅限一词；2. 只允许修改10处，从11处起不计分。
Failure is part of our life. Somebody has ever achieved great success without lots of failures. One experience left lasting impression on me. I’ve been fond of playing the piano since my childhood. Last year there was a piano petition for teenager in my city and I take part in it. I couldn’t wait to show off. The day finally came. However, when I was on the stage I was very nervous that I made several mistakes while playing. My performance was a pletely failure.
It was only after the petition when I realized my failure resulted in my lack of practice. From then on, I devoted more time to play the piano because I finally believe that practice make perfect.somebody----nobody
网友回答
(答案→)somebody----nobody
解析：文章通过作者讲述的一次经历，说明每个人都会失败，关键的是通过失败吸取经验教训。
【小题1】句意：没有经历失败没有人能成功。根据句意是代词错了。
【小题2】一次经历给我留下很深的印象。词组：Leave a lasting impression on sb.给某人留下很深的印象。
【小题3】去年，我们城市有一次年轻人的钢琴比赛。Teenager是可数名词，用复数teenagers。
【小题4】我参加了。因为是last year，所以用一般过去式：
【小题5】当我上了舞台的时候，我是如此紧张以至于演奏的时候犯了几个错误。这里使用了so…that…的句型。
【小题6】我的表演是一个完全的失败。Completely是副词，修饰动词，plete是形容词，修饰名词.
【小题7】就是在那次比赛后，我意识到我的失败是源于我缺乏练习。这句话是强调句。
【小题8】词组：resulted in导致，resulted from源于
【小题9】从那以后，我大部分时间都用来练习钢琴。Devote time to doing sth“花时间做…”。
【小题10】我相信熟能生巧。Practice是不可数名词，谓语是单数。