短文改错!一共十处错误!Three years ago,I was chosen by my classmate

短文改错!一共十处错误!Three years ago,I was chosen by my classmate
Three years ago,I was chosen by my classmate to take part an English speech competition.When go up to the stage,I felt nervous.All at the once,my mother's words came to me,"If you want to succeed,it costs nothing and self-confidence."Since I had the chance to standing here,it meant that I had the ability.I said to myself,"Have you forgotten that you have prepared for this competition for a longer time?You are the best."Strange,my nervousness disappeared.I spoke very fluently that all the audience cheers after my speech.I was successful!