—Jackfelloffthebikeyesterday，butheisallrightnow.—Whatal...

问题详情：

—Jack fell off the bike 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

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题