_________ what would happen,none of them could find a way out.(江西八校09届高三4月联考）

_________ what would happen,none of them could find a way out.(江西八校09届高三4月联考）
A.Having left wondering B.Leaving to wonder
C.Having left to wonder D.Left wondering
我想问A为什么不对.having been left wondering,也可以表示they 与 leave 的被动关系,由于状语的主语同为整个句子主语,所以省略了状语中的be.——这样理解哪里有错误?
只有状语从句中be和主语可省略？