How would you use a radio or a telephone if you had no electricity or batteries？These（46）___bothered（使烦恼） British inventor Trevor Baylis．So in 1996he（47）___ a wind-up（装有发条的）radio．It doesn't need electricity or batteries．You wind it up（48）___ hand．It plays for about an hour．Then，you wind it up（49）___．Today it's made in South Africa．

Then in 1999，Baylis invented a mobile telephone that is powered by（50）___．The shoes contain （含有）a small battery that is powered when you（51）___．This battery is connected to a mobile phone．These two simple inventions can bring modern（52）___ to all parts of the world．

Baylis doesn't have a university degree in engineering．In（53）___，heleft　high school before graduating（毕业）．He just loves （54）___ things to help people．He never knows（55）___ideas will come to him．The idea for the telephone came to him in a dream．