单选题 But you have to study hard, ______?
  • A. mustn't you
  • B. won't you
  • C. don't you
  • D. oughtn't


【正确答案】 C
【答案解析】本题考查的是反意疑问句。have to比较特殊，在这里have为实义动词．要用do来反问，故选C。