UFO stands for "unidentified flying object"(不明飞行物). Many people reported having seen UFOs in the sky. A lot of countries tried to research into them and in 1952 they got the name of UFO.
There were several reports published in the 19th century which were related to UFOs. Denison Daily News in its report of 25th January, 1878 wrote that a farmer, Martin saw a flying object in the sky and it was just like a plate. This was the first time that the word plate had been related to the UFO.
First reports on UFOs came during the World War II. In 1947 the pilot Kenneth Arnold said while he was flying near the Mount Rainer he saw a very bright object in the sky. He told that it was like a plate, too. The information given by Kenneth got lots of attention from the media and people.
Several research organisations gave their reports on the UFOs. They showed direct or indirect physical evidence of UFOs, and sometimes UFOs’ appearance was found in the radar (雷达) screen. Many people try to take video tapes or photos of UFOs as proof. Most UFOs are in plate shape while many UFOs are like cigarettes or half balls.
Many films and TV shows are made about UFOs. There are two famous movies which are created on the topic of UFOs and aliens (外星人), War of the World and Star Wars. UFOs have created a new field in science which is known as Ufology (飞碟学).
72. Which of the following is TRUE according to the passage?
A. People named the flying object UFO in the 19th century.
B. The UFOs Martin and Kenneth Arnold saw were in different shapes.
C. Kenneth Arnold was given much attention for his discovering the UFO.
D. Martin was the first person that described the flying object as a plate.
73. What does the underlined word "proof" in the fourth paragraph mean?
A. Research. B. Evidence. C. Appearance. D. Exhibition.
74. The next paragraph following the passage probably talks about ________.
A. the introduction to UFOs’shapes B. famous movies on UFOs
C. the new science —Ufology D. effects of UFOs on humans
75. This passage is mainly telling us ______.
A. how to discover UFOs B. who discovered UFOs
C. a new field in science D. UFOs’ discoveries and research