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  3. Where Have All Our Visitors Gone? Sixty years ago, a man named Kenneth Arnold saw something that people are still(51)today -some

Where Have All Our Visitors Gone? Sixty years ago, a man named Kenneth Arnold saw something that people are still(51)today -some

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问题 Where Have All Our Visitors Gone?
Sixty years ago, a man named Kenneth Arnold saw something that people are still(51)today -something that changed popular culture for ever.
Flying his plane over mountains in the US state of Washington, he saw a line of strange objects, either crescent -shaped or disc-like, flying(52)the motion of a saucer skimming on water.
The media soon picked up on the story -the Flying Saucers were here! Was the earth being(53)by creatures from another planet? Soon, so many sightings were made that the US military began to(54). It called these strange objects UFOs -Unidentified Flying Objects, and that is how they are(55)today.
Military investigations found no evidence of visitors from outer space. But that did not stop the true(56). The military were(57)up, they said. Or(58)it was because the travelers from space were of such superior intelligence that they could hide from the most sophisticated military analysts.
People have always seen strange lights in the sky. In the past these were explained in(59)ways. In a world where religion was less influential and science fiction was popular, signs from god were replaced by visitors from other(60).
The date of the first UFO signings was also significant. In 1947, World War Ⅱ had just ended and the(61)war was just beginning. Humanity seemed locked in endless conflicts. Like generations before them, people looked(62)the skies for help. But instead of seeking God, they looked for help from super-intelligent aliens with(63)technology. Belief in UFOs became the first religion of science.
However, even people who believe in UFOs are not quite sure why they visit the earth. The universe is a big place and it is(64)to assume that there is life somewhere out there. It is possible that aliens have worked out how to travel through space. Yet some people report that they have been taken by aliens and have had experiments(65)on them. Why would anyone travel across half the universe to conduct medical experiments on people living in small towns in the United States?
选项 A、definitely
B、undoubtedly
C、necessarily
D、maybe
答案D
解析 这四个都是副词，意思是：definitely；肯定地；undoubtedly：毫无疑问地 necessarily：必定地；maybe：可能。相关句子的第一个词是o，(或者)，表示两种情况都有可能，因此只有用maybe在语义上才是一致的。
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