问题补充:
smoking, he would not have got cancer in the lung.
A. Was he given up
B. Had he given up w.w.w.k.s.5.u.c.o.m
C. Did he give
D. If he gave up
答案:
A. Was he given up
(答案→)B. Had he given up w.w.w.k.s.5.u.c.o.m
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。