单选题 How much did you ______ fixing the TV?
  • A. pay off
  • B. pay back
  • C. pay for
  • D. pay down
【正确答案】 C
【答案解析】[解析] pay off还清(债务等)；pay back偿还(借款)，报答，报复；pay for偿还；pay down用现金支付。根据句意应该选C。