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    【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

    【答案】B

    【解析】

    试题分析：考查虚拟语气。句意∶杰克昨天从梯子上掉下来了，但是他现在都没事。多幸运啊，他本来应该伤的很重的。could have done…本可以做而没做。故选B。

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