单选题 For 5O years they wore able to produce and sell their goods more cheaply than other countries and this gave them a ______ advantage in world trade.
  • A.considerable
  • B.concrete
  • C.considerate
  • D.conventional
【正确答案】 A
【答案解析】[解析] 各项的意思是：considerable“相当大(或多)的”；concrete“实体的，确定的”；considerate“体贴的；体谅的”；conventional“依照惯例的，常规的”。根据句意判断，答案是A。