He was( ) in a car accident. A died B killed

B
他在一次汽车事故中丧生了.为什么A不行？die 是不及物动词，没有被动语态。died是形容词啊！Be动词加形容词，为啥不行了？die 的形容词是：dead

A如果是dead 就对，即He was dead in a car accident .died 不是有“死的”的意思吗？

He diedin a car accident .对吗？对，这里的died 是die 的过去式，作谓语他在一次汽车事故中丧生了。

He was killed in a car accident.
He was dead in a car accident .
He diedin a car accident .

对吗？都可以。