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：在缺词处加一个漏词符号()，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．每处错误及修改均仅限一词；
2．只允许修改10处，多者(从第11处起)不计分。
We middle school students have had many tests or exam. We have achieved success and suffer failure. Different students take different attitudes to failure. Some is in low spirits when they don’t do well in the exams. They usually lose their heart and no longer study so harder as before. But most students take an active attitude towards failure. They encourage themselves to be confidently. They try to find out but analyse the causes so that they will no longer make same mistakes. I agree with those which have active attitudes. As we are all know, failure is the mother of success.