【题目】-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
在线课程【答案】B
【解析】
试题分析：考查虚拟语气。句意：杰克昨天从梯子上摔下来了，但是他现在很好。多幸运啊！他本来可能会受到重伤。对过去事实的虚拟，是一种可能性，故选B项。