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根据下面内容,回答题:

  • A group of scientists rowing toward the center of a lake saw something shocking. They turned back as fast as they could. What had they seen? The lake was boiling!    The group was investigating a crater lake in the mountains of St.
  • A.mountain climbing
  • B.a boiling lake
  • C.a new volcanic island
  • D.a mysterious blob
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  • A.The article doesn"t say.
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