__their help ,we would not have succeededA Hadn't been for B Had it not been for C It hadn't been for D Had not it been for给理由,谢谢
问题描述：
__their help ,we would not have succeeded
A Hadn't been for
B Had it not been for
C It hadn't been for
D Had not it been for
给理由,谢谢
答
B解释就不说了，楼上都有，就是排除法也出来了，A和D是同样，故不选。只剩下BC，would not have 这边显然表示的是虚拟语气，C排除，只剩下B了
答
A
答
选B Had it not been for 1.等于 If it had not been for their help 因为If 省略了,习惯上只有把助动词had前置2.这是个固定句型,表示“如果没有”3.从主句形式可见,这是表示与过去事实相反的虚拟语气全句意为：如果...
答
B had it not been for = if it had not been for
这是与过去事实相反的虚拟条件句， 要不是因为他们的帮助。
不懂追问，如能帮到，请及时采纳，谢谢！