The meeting----------- over,our headmaster soon left the meeting room.
问题描述：
The meeting----------- over,our headmaster soon left the meeting room.
A is B was C being D have been
可是我选的D.我觉得不应该是理解为会议先结束了之后headmaster在离开吗...求解释为什么是C
答
D肯定不对,后面的句子为过去时态,前面必定为过去时态.又因为已经有谓语动词,前边句子为介词短语作状语,一个句子只有一个谓语动词（不存在连词的情况下）,B选项在逗号改为句号时可选.