He must have an accident,or he ( ) here then.A.should have been B.should be C.would be D.were为什么不选B 怎么看出前半句是过去完成时的?

分类: 作业答案 • 2022-07-31 15:33:22

问题描述：

He must have an accident,or he ( ) here then.
A.should have been B.should be C.would be D.were
为什么不选B 怎么看出前半句是过去完成时的?

答