单选题 The Lewis and Clark expedition ______ the territory of the Louiskana Purchase and beyond as far as the Pacific Ocean.
  • A. located
  • B. searched
  • C. exploited
  • D. developed
【正确答案】 C
【答案解析】[解析] 本题中，C项的exploited“开拓”符合题意。其他三项located“位于”；searched“搜索”；developed“发展”都不正确。