______ for the fact that his father was in hospital he might have gone abroad.A．Hadn"t it
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______ for the fact that his father was in hospital, he might have gone abroad.
A．Hadn"t it been
B．Had it not been
C．Were it not
D．Was it not
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
虚拟语气。本句主句用了might have gone，说明本句内容与过去事实相反，所以从句应该使用过去完成时。Had it not been for是if it had not been for的倒装形式，表示“要不是”。A、D两个选项本身就不可用于虚拟语气。C项were it not for也可用于虚拟语气，表示“要不是，要是没有”，是if it were not for的倒装形式，但主句内容应与现在或将来事实相反。