Lei Feng was --------(die),but he always live in our hearts.

Lei Feng was (dead),but he always live in our hearts.
雷锋死了,但他永远活在我们心中.
die是不及物动词,在句中做谓语.如He died（他死了）.
death是名词,如his death（他的死亡）.
dead是形容词,在句中做表语或定语.如本句的用法be dead.还有a dead man.