every evening he sat in his armchair with his eyes____on the TV

问题描述:

every evening he sat in his armchair with his eyes____on the TV
A.fixing B.to fix C.fixed D.fix
该选哪个?为什么呢?
可是答案为什么选C呢?过去分词形式

个人觉得C是对的,因为 C 暗含fix his eyes on the TV,变换成被动式就是 eyes fixing on TV