问题
选择题
______ 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
B
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。