Last night,the Swedish Rock Band,yesterday,gave a concert in

Last night,the Swedish Rock Band,yesterday,gave a concert in Kunming.Many students and young people went there.They enjoyed the concert very much.Max jumped up and down carelessly.And he fell down in the muddle of the concert.He broke his leg.Some people took him to hospital.There were only two singers after Max left,but they went on singing.They sang some of thei favorite songs.At the end of the concert,Erik sang a song very well in Chinese.He was trying to learn Chinese and he likes listening to Chinese songs.He learnet that song when he was in Shanghai last month.
Were there many old people there?Why not?
How many singers were there at the start of the concert?
Did the concert stop after Max left?
What did Eric do at the end of the concert?
What happened in the middle of the concert?