The reason ( ) he missed the train was ( ) got up late.

The reason ( ) he missed the train was ( ) got up late.
A、because, he
B、because, that he
C、why, he
D、why, that he
【正确答案】：D
【题目解析】：the reason why 定语从句，why是关系副词在从句做原因状语，中文意思是…的原因，was that 表语从句，that 属于表语从句引导词，句子含义是他错过火车的原因是他起得太晚了。