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twice, the postman refused to deliver our letters unless we chained our dog. A.B

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twice, the postman refused to deliver our letters unless we chained our dog. A.B

________ 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

试题答案

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。