题目内容：

Movies used to be shown in an open space in our town,with audience _ on benches,chairs or boexs.
A.seating B.to seat C.seated D.being seated
请问为什么呢?

优质解答

这里seated 是be seated 的省略形式,因为这里是独立主格形式,不能有was.
可以换成sitting,现在分词表主动