He passed the eaxm because of lucky（改错）

He passed the eaxm because of lucky（改错）
He passed the eaxm because of lucky（改错）

He passed the eaxm because of lucky（改错）
He passed the eaxm because of lucky.
首先eaxm是exam.
Because + that(原因状语从句)
Because of + n.或者动名词
所以这句应该改成：
He passed the exam because of luckiness.(luck亦可,但luckiness最佳)

He passed the eaxm because of luck.
because of后面加名词