The reason________he didn't come was _____he was seriously injured in a car accident.

问题描述:

The reason________he didn't come was _____he was seriously injured in a car accident.
说出原因给分!

前面填why 后面填that
前面是定语从句表原因
后面是表语从句..除去中间的多于部分是the reason was that he was seriously injured in a car accident..原因是他在车祸中受重伤..由于从句部分不缺成分所以用that