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题目内容
（石家庄铁道大学-大学英语3）
17、
______ twice, the postman refused to deliver our letters unless we chained our dog up.
A、 Being bitten
B、 Had been bitten
C、 Having bitten
D、 Having been bitten
______ twice, the postman refused to deliver our letters unless we chained our dog up.
A、 Being bitten
B、 Had been bitten
C、 Having bitten
D、 Having been bitten
参考答案