People use the word "unidentified" to describe the reported flying objects becau

游客2023-09-16  26

问题 People use the word "unidentified" to describe the reported flying objects because what these objects are is still unknown. [br] 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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