英语作文急求一篇关于：你犯过最大的错误是什么,你从中学到了什么?

the biggest mistake i got before is wasting my time.that is happened when i was in junior school.most students were preparing their final exam hardly on that time except me.i felt so lazy and did not want to study.the only thing i enjoyed was playing computer-games.consequently,it was no doubt that i failed the exam.but after that,i know,without enough efforts,it is impossible to achieve the success.i should not waste my time again,and try my best to study for being a good student.