Radio isn’t out of date, and a lot of people listen to it every day. 　　Marconi, the Italian (71)________ who gave us the radio, probably didn’t invent 　　realize what (72)________ his great invention would have on the world effect 　　in years to come. Radio has, perhaps, had as much influence on the world 　　as any other (73)________ device. Events of universal interest can be communicate 　　reported to the entire globe a few second after they happen, (74)________ explore 　　in remote areas, ships at sea, even astronauts (75)________ the earth are circle 　　able to keep in touch with civilization by means of radio.