20．35 passengers died in the bullet train accident. But for the heroic train driver, many more people ________.
A．had died B．would die
C．would have died D．died
解析：考查虚拟语气。But for the heroic train driver 意为“要不是那个英勇的司机”，表达的是一个与过去事实相反的条件，故主句表达的结果也应该与过去的结果相反，应用would have done结构，故答案为C。
答案：C。
