单选题 —Jack fell off the bike, but he is all right now.
—What a lucky dog! He ______ himself badly.
  • A.should have injured
  • B.might injure
  • C.should injure
  • D.could have injured
【正确答案】 D
【答案解析】[解析] 本题考查情态动词的用法。could have done表示对过去情况的推测。