I got bad marks in this afternoon's math exam.I had a bad mood all the time. In the evening ,my classmates invited me to sing KTV,it was my first time to go to KTV.They sang happily,I was as listener all the time.I didn't think I sang well.I was afraid to sing.When others encouraged me,I took the Mic at last and sang a song called .Now,I have a good mood.The most important is I find back my confidence.