1:The sale usually takes place outside the house,with the audience__on benches,chairs or boxes.

问题描述:

1:The sale usually takes place outside the house,with the audience__on benches,chairs or boxes.
A:having seated B:seating C:seated D:having been seated

B:seating
表示状态.因为audience与坐是主动的关系,所以B
完成时,意思就不合拉.