单选题 The purpose of a ______ is to cut down imports in order to protect domestic industry and workers from foreign competition.
  • A. tax
  • B. toll
  • C. fee
  • D. tariff
【正确答案】 D
【答案解析】[解析] 各项的意思为：tariff关税。tax税；toll服务费；fee费用。所以，本题选D。