（）twice,the postman refused to deliever our letters unless w

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（）twice,the postman refused to deliever our letters unless we chained our dog.
A.Being bitten B.To be bitten C.Bitten D.Having bitten

如果一定要从中选的话,只能选C
除非D选项是Having been bitten
如果分词是短暂动词,那么该分词完成式所表示的动作往往是在谓语动作之前发生过多次,请看例句：
　　(1)Having been bitten twice,the postman refused to deliver our letters unless we chained our dog up.

（）twice,the postman refused to deliever our letters unless w （）twice ,the Postman refused to deliver our letters unless ___twice,the postman refused to deliver our letters unless w ____twice,the postman refused to deliver our letters unless __twice,the postman refused to deliver our letters unless we ____twice ,the postman refused to deliver our letters unless Bitten twice,the Postman refused to deliver our letters unle ---------- twice,the postman refused to deliver our letters ___twice ,the postman refuse to deliver our letters unless w 1.___ twice,the postman refused to deliver our letters unles 英语选择.-------twice ,the postman refused to deliver our letter 一道高考题being bitten twice ,the postman refused to diliver our