I thought she was shy,but then I found she was just not interested in the topic.

问题描述:

I thought she was shy,but then I found she was just not interested in the topic.
A.First of all B.At first C.For the first time D.In the first place

选B,表示和then表示时间的先后,A是首先的意思,C是第一次,D是最重要的,第一位.
起初我以为她有点内向,后来才发现原来是对这个话题不感兴趣.