In every life there must be a mistake. My mistake is I ask my friend while exam. I think it mistake is a fatal. if back in time would not have turned to ask a friend I will read a book I will do as much as I do, I do not intend this error has occurred. extremely scared me when I was a teacher and see regret with this error and I felt guilty that makes friends with a troubling. This is a crash while I was checking my voltage will not make a mistake like this from occurring again.