Lesson 1. Inventions and Discoveries » 13

13. Make up sentences in the Passive Voice. 1) The law of universal gravitation was discovered by Isaac Newton. 2) The phonograph and light bulb were invented by Thomas Edison 3) Prototypes of the helicopter, glider and military tank were designed by L. da Vinci 4) The first astronomical telescope was constructed by Galileo Galilei 5) The formula for the volume of a sphere was discovered by Archimedes 6) The theory of relativity was developed by Albert Einstein 7) X–rays were discovered by Rontgen 8) Analytic geometry was founded by Rene Descartes. 9) The hydraulic press was invented by Blaise Pascal