Young Marconi had the teachers to give him lessons at home in Italy.He loved books，especially 21________ on science.He had curious mind and always wanted to prove for himself 22________ he read.
23________ day，when he was sitting by an open window，it seemed that a thousand 24________ filled his ears.“Where are they all 25________ ?”he asked himself.“And where will they go? What happens to all the words that people say?Do they 26________ in the air around the earth，27 ________ waiting for someone to pick them up?”
At once Marconi went to work.Sounds cal3 be made t0 28 ________ ，he thought，if they are given a push by electricity.If I call push a piece of wood across the waves of water.I can also 29________ sounds through the air waves by electrical power.
A few weeks 30________ he called his mother and father up to his workroom for a 31 ________.He touched a little machine，and two floors below there was the sound of a buzz(嗡嗡声).“How did you do it?”they asked.“Your machine is 32________ far from the sound.”
“That’s right，”he said happily.“I have just found a 33________ to carry sound without wires.’’
Although Marconi’S father did not think the wireless sound would 34________ be important，he gave his son some money to 35________ his work.“Father，with this money I am going to send messages round the world one day.’’