题目内容

—Jack fell off the ladder yesterday，but he is all right now.
—What a lucky dog! He________ himself badly.
A．should injureB．might injure
C．should have injuredD．could have injured
D

试题分析：考查情态动词的完成式的用法。句意：——昨天杰克从自行车上掉下来了，但现在没事了。——真幸运！他可能会受伤的。由语境可知，空格处表示对过去情况的推测，应该在CD里面选择，could have done 意为“可能会…却没有”；should have done 意为“过去”应该干某事而没有干”。故D 项正确，
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