2. 外语
  3. People use the word "unidentified" to describe the reported flying objects because what these objects are is still unknown. The

People use the word "unidentified" to describe the reported flying objects because what these objects are is still unknown. The

admin2009-04-23  33
问题 People use the word "unidentified" to describe the reported flying objects because what these objects are is still unknown.
The author doubts that men can find answers to the ______ in the near future.
选项
答案mystery of UFOs
解析 由文章最后一段"Time may tell us the answer to this mystery,..."它只是说时间也许会告诉我们答案，也只是一种猜测，与题意“作者怀疑人类能找到关于神秘的UFO是什么”相一致。
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大学英语六级

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