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