Everything _____very different if your father were still alive.
【正确答案】 B
【答案解析】解析:本题条件状语从句中的谓语动词用了过去式were,说明“假设情况”的内容与现在或将来的情况相反,所以主句的谓语动词应该用“would+动词原形”表虚拟,答案为B。