__________ more careful, his ship would not have sunk.
A、If the captain were
B、Had the captain been
C、Should the captain be
D、If the captain would have been
【正确答案】：B
【题目解析】：由主句谓语可判断，从句应表示与过去事实相反的情况，虚拟条件句中的谓语应 用过去完成时。动词放句首的倒装形式表明是虚拟语气。Had the captain been=If the captain had been。
