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文意選填 (93學年度學科能力測驗)
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Although stories about aliens have never been officially confirmed, their existence has been widely speculated upon.

Many people believe that   from outer space have visited us for centuries. Some say that life on Earth  out thereand was seeded here. Others say that aliens have   what happens on Earth, and are responsible for quite a few legends, and that the ancient Greek and Roman gods,   the fairies and dwarfs in many classical tales, were in factspace peopleliving here. Still   say that aliens were responsible for the growth of highly evolved civilizations which have   perished, including the Incan and Mayan civilizations and the legendary Atlantis.

A lot of ancient civilizations,   the Egyptians, Hindus, Greeks, and Mayans, have left writings and   which indicate contacts with superior beingsfrom the stars.” Many believe that the aliens are here to help us, while others hold that the aliens intend us  . Still others think that most aliens visit Earth to study us like our scientists study primitive natives and animals, and have no interest in helping us  .

It is difficult to comment conclusively on these theories in general, apart from saying that any and all of them might be possible. Maybe time will tell.

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