smoking he would not have got cancer in the lung.A. Was he given upB. Had he given up C.

问题补充：

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

答案：

A. Was he given up

(答案→)B. Had he given up

C. Did he give

D. If he gave up

解析：是因为时态前后有矛盾。由于主句谓语是would not have got，这表明是对过去事实作出的假设，所以从句谓语应该是 had given up，而不是像D项那样用一般过去时。另外，当虚拟条件句中有 had, should, were 等词时，通常可以省略 if，并将 had, should, were 提前置于句首。