The dogs ____ ,the childen went by without fright.A.killing B.killed C.being killed D.having been killed但我想知道为什么?为什么是having been

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Thedogs____,thechildenwentbywithoutfright.A.killingB.killedC.beingkilledD.havingbeenkilled但我想知道为什么?为

The dogs ____ ,the childen went by without fright.A.killing B.killed C.being killed D.having been killed但我想知道为什么?为什么是having been
The dogs ____ ,the childen went by without fright.
A.killing B.killed C.being killed D.having been killed
但我想知道为什么?
为什么是having been

The dogs ____ ,the childen went by without fright.A.killing B.killed C.being killed D.having been killed但我想知道为什么?为什么是having been
D,狗被杀死了.
the childen went 中went是过去时,够被杀,肯定是过去完成时.