Question

-Jack fell off a ladder yesterday, but he’s all right．

-He is lucky．He _________ himself badly．

1. A.
   would rather have hurt
2. B.
   must have hurt
3. C.
   could hurt
4. D.
   could have hurt

Answer 1

D
句意：“杰克昨天从梯子上摔下来了，但是他完好无损。”“他真幸运，他本有可能严重摔伤的。”could have hurt表示与过去事实相反的动作。