单选题 Since the 1950's, literary critics have attempted to answer the question: When did children's literature first emerge as a distinct literary genre?
  • A. improve
  • B. appear
  • C. conform
  • D. respond


【正确答案】 B
【答案解析】emerge和appear都表示“出现、露面”；improve：增进、改善；conform：符合、顺应；respond：反应、回报。