______ smoking, he would not have got cancer in the lung.
A．Was he given upB．Had he given up
C．Did he giveD．If he gave up
B
是因為時態(tài)前后有矛盾。由于主句謂語是would not have got，這表明是對過去事實作出的假設(shè)，所以從句謂語應(yīng)該是 had given up，而不是像D項那樣用一般過去時。另外，當(dāng)虛擬條件句中有 had, should, were 等詞時，通�？梢允÷� if，并將 had, should, were 提前置于句首。
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