-Jackfellofftheladderyesterday,butheisallrightnow．-What...

问题详情：

-Jack fell off the ladder yesterday, but he is all right now．

-What a lucky dog! He _________ himself badly．

A．should injure                          B．could have injured   

C．should have injured                     D．might injure

【回答】

B

知识点：虚拟语气与情态动词

题型：选择题