我的脑海里充满了前一天晚上发生的事情，我无法集中注意力。

My ___mind was full of what had happened the night before, and I wasn't concentrating.

我只是说出了脑海中闪现的第一件事。

I just said the first thing that came into my ___mind.

不知为何，她的话一直萦绕在我脑海里。

For some reason her words stuck in my ___mind.