The sale usually takes place out side the house,with the audience ____ on benches,chairs or boxes.

问题描述:

The sale usually takes place out side the house,with the audience ____ on benches,chairs or boxes.
A.having seated B.seating C.seated D.having been seated
这里为什么选C不选B
独立主格中,观众不是在甩卖的时候,正坐在下面吗?

根据短语be seated 而来,表示状态
seat没有ing形式
选C. seated