一个选择题，请帮忙看看．

C
首先,I really don't know ...后面应是陈述句语序
所以I really don't know what it was
其次, that made her so angry. 是定语从句,修饰前面的what.干扰解题.

C
可以分两句来看
第一句:
I really don't know....下面应该为what it is(was)
第二句:
it was that made her so angry

C因为全句子是一个陈述句 所以系动词WAS应该放在it后面 疑问词what在非强调状态下应该在分句之首
不知道这样解释明不明白？

A吧，我觉的是。本句话的意思是：对不起我真的不知道什么使他这么不高兴？

c

c