1 Unidentified Flying Object
2 yes （But the Center for UFO Studies continues to receive hundreds of reports every ）
3 1947（ In 1947 a businessman and pilot, Kenneth Arnold, was flying near Mount Rainier, Washington when he saw nine shiny, round objects flying through the air. He told a newspaper reporter that they looked like "pie plates skipping over water". The reporter used the words "flying saucer（飞碟）" in his story and today that is a popular name for UFOs.）
4 a businessman and pilot（In 1947 a businessman and pilot, Kenneth Arnold）
5 three （Encounters of the first kind Encounters of the second kind Close encounters of the third kind）