单选题 The national table tennis team ______ hard to win honor for China these years.
  • A. work
  • B. are working
  • C. has been working
  • D. has worked
【正确答案】 C
【答案解析】[解析] 根据句中的“these years”可知，句子表示从过去某时开始一直持续到现在的动作，并且还将持续下去。所以应该用现在完成进行时。故选C。