Some students ran back to the dormitory,magazine ___under thei arms.A.to be held B.was held C.held D.Such being 为什么选C?

问题描述:

Some students ran back to the dormitory,magazine ___under thei arms.
A.to be held B.was held C.held D.Such being
为什么选C?

这是独立主格结构,高中才会学到
后半句做伴随状语,用分词连接,被动的,所以用过去分词