i had forgotten to bring it with me.that made me annoyed with myself.

问题描述:

i had forgotten to bring it with me.that made me annoyed with myself.
这句话中的that为什么不用which,什么情况下用which?

me后面是句号,说面这前后是两个独立的句子,后面并不是定语从句.
That作为代词指代前面的那件事.