for the fact that she broke her leg she might have passed the exam.A. Hadn’t it beenB.

问题补充：

for the fact that she broke her leg, she might have passed the exam.

A. Hadn’t it been

B. Had it not been

C. Was it not

D. Were it not

答案：

A. Hadn’t it been

(答案→)B. Had it not been

C. Was it not

D. Were it not

解析：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。