(答案) C among改为between

　　(2) The Carlsbad caverns, located in New Mexico, rank between the largest underground labyrinths in the world.

　　(答案) B between改为among。表示多数概念，或范围时应用among。

　　(3) For a long time cotton ranked first bctween Alabama's crops, but today it accounts for only a fraction of the agricultural production.

　　(答案) A between改为among。表示范围时应用among。