问题
选择题
---Mary knocked into a tree last night while driving, but she is all right.
---She is lucky. She herself badly.
A．should injure
B．might injure
C．should have injured
D．could have injured
答案
答案：D
题目分析： 句意：--玛丽昨晚开车的时候撞到了树上，但是她没事。--她很幸运，她本来可能伤的很严重的。因为玛丽没事，所以伤的严重只是虚拟语气，因为是对过去的虚拟，所以排除AB，should have done本应该做而没做，不符合句意，could have done过去本可能做而没做，所以选D。