Question

movies used to be shown in an open space ,with audience__ on

Answer 1

A seated

with+名词或代词+过去分词,是独立主格结构,做伴随状语

seat做谓语时,是seat sb,sb be seated.但做状语,补足语,定语等时,就要去掉be,而保留过去分词seated.

I found my father seated on the chair.(做补足语)

The man seated on the chair was my father.（做定语）

Seated on the floor,they talked and laughed.(做状语)