急!拜托各路大神帮忙弄个英语短文改错啊!

Last month,(加the) 10th foreign language speech competition was successfully held by the students' union.I didn't show some(改any) interest in it since (since改though） my Enlish teacher Mr.Smith encouraged me.Inspiring（改Inspired） by my teacher,I signed up for the competition and made fully（改full） preparations for it.Two weeks later,the time I had been looking forward to coming(改came) and it was my turn.Glancing at my teacher's smiling face,I built up my confidence,Much to me(改my) delight,the result was announced and Iwas one of the winner(改winners).Without my teacher's encouragement,I couldn't have won for(去掉for) the first prize.I'm proud to have a teacher like Mr.Smith or(改and) the wonderful experience.