6. Read the passage and answer the multiple-choice questions. In 1863, the French writer Ponton D’Amecourt was the first person to create the word “helicopter” from the two words “helico” for spiral and “pter” for wings. The very fữst helicopter was invented by Paul Comu in 1907, but it was not successíul. French inventor, Etienne Oehmichen built and flew a helicopter one kilometer in 1924. However, Igor Sikorsky is considered to be the father of helicopters not because he invented the first. He is called that because he invented the first successful helicopter, upon which further designs were based. One of aviation’s greatest designers, Russian born Igor Sikorsky began work on helicopters as early as 1910. By 1940, Igor Sikorsky’s successful VS-300 had become the model for all modem helicopters of today. He also designed and built the first military helicopter. Igor Sikorsky’s helicopters had the control to fly safely forwards and backwards, up and down, and sideways. In 1958, Igor Sikorsky’s company made the world’s first helicopter that could land and take off from water. It could also float on the water. a) Igor Sikorsky invented the first helicopter in the world. A. True B. False C. Not mentioned b) Who created the word “helicopter”? A. Igor Sikorsky B. Paul Comu S. Ponton D’Amecourt D. Etienne Oehmichen c) Why was Igor Sikorsky called the father of helicopter? A. He invented the fiirst helicopter. B. He began his work earlier than other inventors. C. He designed the first successful helicopter. D. He built the first military helicopter. d) Igor Sikorsky designed VS-300 helicopter model A. before 1910 B. before 1940 C. after 1940 D. after 1958 e) What made Igor Sikorsky’s helicopters successful? A. His helicopters can fly more than one kilometer. B. His helicopters can fly in all directions. C. His helicopters are cheaper to produce. D. His helicopters can be used as military helicopters. f) On the whole, the passage is about____________ . A. Igor Sikorsky’s military helicopters B. Igor Sikorsky’s successful invention of helicopters C. a brief history of helicopters D. the first helicopter in the world