When I went in ,they were_ in a heated discussion.

题目

When I went in ,they were_ in a heated discussion.
A.absorb B.absorbed C absorbing D being absorbed
选什么,求答案和理由,是B还是D?

答案

答案选B.
原因：首先be absorbed in是固定搭配,意思为全神贯注于,沉浸于...此处的absorbed我们应该理解为一种精神状态,而不是一个动作.若果这样的话,D选项在absorbed前加ing就是错的,因为它不解释为一个动词.为了让你更好理解,我举个例子：
I am totally interested in this novel.我非常对这本小说感兴趣.
interested是作为一个情感状态的词出现,而不是interest的过去分词来理解.
类似的词组还有：be excited about、be frightened of,be surprised at等等.