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________ 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。


解析:

根據句意,句子主語the postman與動詞bite之間為被動關系,所以首先可排除選項C;再根據句意(尤其是注意關鍵詞twice)可知,表示正在進行選項A和表示將要發生的選項D均不合題意。全句意為:郵遞員被狗咬了兩次之后要我們把狗拴起來,不然就不給我們送信了。

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