问题补充:
--- Jack fell off the ladder yesterday, but he is all right now?
---What a lucky dog! He himself badly.
A. should injure
B. might injure
C. should have injured
D. could have injured
答案:
A. should injure
B. might injure
C. should have injured
(答案→)D. could have injured
解析:可联系答.案.网客服索取。