____by a group of children, the teacher entered the hall.
_____by a group of children,the teacher entered the lecture hall.
A.Surrounded
B.Surrounding
C.To be Surrounded
D.Being Surrounded
为什么不选D?不是伴随状态吗
being done 和done 在这种类型的句子中到底有什么区别?希望详细点.谢谢~