After a few rounds of talks,both sides regarded the problem___A.being settledB.to be settledC.had settledDas settled.选D为

问题描述:

After a few rounds of talks,both sides regarded the problem___A.being settledB.to be settledC.had settledDas settled.选D为什么?

几轮谈判后,双方都认为问题解决了.
regard ---as 认为---
settled 过去分词表示动作已经完成了,