___twice ,the postman refuse to deliver our letters unless we chained our dog up.

题目

___twice ,the postman refuse to deliver our letters unless we chained our dog up.
A Having bitten B Being bitten
C Bitten D To be bitten

答案

本题应选C ,过去分词做状语,与句子的逻辑主语the postman 之间构成被动关系,表示已经发生的动作,句子语义为：这个邮递员被狗咬过两次后,我我们不把狗用铁链拴起来,他就不给我们送信