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_________ smoking,he would not have got cancer in the lung.

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_________ smoking,he would not have got cancer in the lung.
A.Was he given up
B.Had he given up
C.Did he give
D.If he gave up
希望回答的朋友,不要只是个答案哦.
希望能讲解讲解.
答案一定是B
要是他戒了烟的话(事实上他没戒)是虚拟语气
其实句子相当于
If he had given up smoking
这是它的倒装结构
于过去事实相反的假设