问题
选择题
________ 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
答案
答案：B
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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
答案：B
