________ twice, the postman refused to deliver our letters unless we chained our dog.
A. Being bitten B. Bitten
C. Having bitten D. To be bitten
________ twice, the postman refused to deliver our letters unless we chained our dog.
A. Being bitten B. Bitten
C. Having bitten D. To be bitten
B
B。根据句意，句子主语the postman与动词bite之间为被动关系，所以首先可排除选项C；再根据句意（尤其是注意关键词twice）可知，表示正在进行选项A和表示将要发生的选项D均不合题意。全句意为：邮递员被狗咬了两次之后要我们把狗拴起来，不然就不给我们送信了。