When the light went out at eight o’clock yesterday evening,Mr Zhang was watching a baketball match on TV,so he had to listen to the radio instead later.Sally was playing the piano,so she had to stop to have a rest.Tom was doing some reading in his room,so he had to go to bed later.Mrs Wang was then in the lift,so she couldn't get out.Luckily she called the police by mobile phone and was rescued at last.