The reason why he was chosen remains unknown 这是同位语从句还是定语从句

The reason why he was chosen remains unknown 这是同位语从句还是定语从句 关于同位语从句的问题eg.The reason why he was chosen remains unknown.这句 The reason why he was chosen remains unknown why在从句中是做宾语吗 前半部分是定语从句还是同位语从句?The reason why he was dismissed is that hew The reason why he is here is simple.是同位语从句还是定语从句? the reason why是定语从句,the reason that是同位语从句, 定于从句还是同位语从句?the reason why he missed the train was that he g the reason why you will never become rich是定语从句还是原因状语从句还是同位语从 英语翻译that he has lied to me 是同位语从句还是定语从句?the reason是不是that he that is the reason why I am late .是同位语从句还是原因状语从句 "We heard the news that he had told her"是定语从句还是同位语从句? 同位语从句 the reason why中why可否省略?