seat一定是be seated?

问题描述:

seat一定是be seated?
what surprised me was to see some of the village people_on the beaches at the end of the room
a seating b seated c seat d to be seating
BE SEATED没选择呀?BE哪去了?

what surprised me was to see some of the village people (who was) seated on the beaches at the end of the room
省略了