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________ for the fact that she broke her leg, she might have passed the exam.
A.Hadn’t it beenB.Had it not beenC.Was it notD.Were it not
B

试题分析:考查虚拟语气中的倒装句。在条件句的虚拟语气中,如果省略了if,要享受部分倒装。本题是与过去事实相反,条件句中要使用过去完成时的时态,本题省略了if,故使用B项。句意:如果不是因为他的腿断了,她也许会通过这次考试。故B正确。
点评:在条件句中,如果过去事实相反,条件句中使用过去完成时,主句使用“情态动词+have done”;
如果主句与现在事实相反,条件句中使用过去时,be动词使用were,主句中使用“情态动词+动词原形”;如果与将来事实相反,条件句中有三种:过去时;were to do ;should+动词原形,主句使用“情态动词+动词原形”;要特别注意如果省略了if,句子要使用部分倒装的形式,把助动词,be动词,情态动词提之主语前。
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