单选题 Over six million citizens of the United States benefit from private pension plans each year.
  • A. unauthorized
  • B. confidential
  • C. nontransferable
  • D. non-governmental


【正确答案】 D
【答案解析】private：私人的，和non—governmental(非政府的、非官方的)意思相近；unauthorized：未授权的、未经许可的；confidential：秘密的、机密的；nontransferable：不可转让的：。