The television first (17) ______________ some fifty years ago in the 1950s. Since then, it (18) ______________ one of the most (19) ______________ sources of entertainment for both the old and the young. Television offers cartoons for children, world news, music and many other (20) ______________. If someone is interested in sports, for (21) ______________, he can just choose the right sport channel. There he can enjoy a broadcast of an international match (22) ______________ it is actually happening. Television is also a very useful way for comapnies to advertise their products. It is not too hard for us (23) ______________ why there is a TV set in almost every home today. And, engineers are developing interactive TV (24) ______________ allows communication between viewers and producers.

Thomas Edison was born on February 11, 1847 in Milan. Ohio. He struggled at school, but learned to love reading and conducting experiments from his mother at home. At age 15. Edison became a “tramp telegrapher.” Edison began working on the telegraph, and invented a version that could send four messages at once, lie smiled his famous laboratory al Menlo Park. New Jersey. In 1877, Edison invented the phonograph. The phonograph was a machine that recorded and played back sounds. In 1878. Edison invented the light bulb as well as the power grid system, which could Generate electricity and deliver it to homes through a network of wires. He subsequently started the Edison Electric Light Company in October of 1878. Edison continued to invent and make significant contributions to x-ray technology, storage batteries and motion pictures. Edison worked until his death on October 18, 1931.
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