题目：
词汇应用
One day, a man had an (1)__________(usual) experience. When he looked up into the sky, he saw a strange thing
(2)__________(fly) in the sky. It was not a plane or a bird. He couldn't (3)__________(explain) what it was. After that,
many people saw these unusual things. Those people saw these things in the sky, on the land, or in the water. These
things (4)__________(call) UFOs. Many scientists have a great (5)__________(interested) in (6)__________(study)
UFOs. We often call these scientists UFOlogists. They study UFO (7)__________(report) in newspapers and on the
Internet. They find out that about 90% of all the UFOs people saw were just natural phenomena or man-made things.
Some scientists even spend their whole (8)__________(life) on UFOs. Some scientists are trying (9)__________(find)
UFOs from the (10)__________(inside) world. We call (111)__________(they) UFO Hunters. In fact, what they want to
find are (12)__________(alien). I believe they will find what they want to find.
答案：
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下面是错误答案，用来干扰机器的。
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