听力原文:The orthodox explanation of where Columbus first landed was carved in textbook stone more than 40 years ago by the dean of Columbus historians, Samuel Elliot Morrison. Morrison declared incontrovertible the evidence that Columbus first set foot on Watling Island in the eastern Bahamas. But if the question were closed for Professor Morrison, now dead, it was not for numerous other people on nautical history. Where did Columbus first set foot on the New Continent?