---Jackfellofftheladderyesterday,butheisallrightnow.---...

问题详情：

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

---What a lucky dog! He _______ himself badly.

A． could injure               B． must have injured

C． should injure             D． might have injured

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题