All flights_because of the thick fog,we decided to go back to the hotel.why the answer is "having been cancelled"?

分类: 作业答案 • 2021-12-19 16:23:57

问题描述：

All flights_because of the thick fog,we decided to go back to the hotel.
why the answer is "having been cancelled"?

答

完成时作状语表示已经取消,强调过去的动作对现在的影响