英语关于宾语从句语序的问题

题目

英语关于宾语从句语序的问题
好的……这个句子一直分不清……
I didn't know -----------------------------
A .what the matter was with him B.what was the weather like
C.what had happened to him D.what was the date that day
当初选了个A ……老师说A对的话应该改成what was the matter with him不明白………………如果这样改,怎么觉得就和BC差不多了……
请问哪位老师或哥哥姐姐能帮帮我,

答案

I didn't know -----------------------------
A .what the matter was with him B.what was the weather like
C.what had happened to him D.what was the date that day
选C
一般来说,宾语从句要用陈述句语序的
但是what's the matter/wrong是特殊用法,在从句中语序不变的
其他情况下,都是要变语序的
有不会的可以再问我