______ 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

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______ 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

随机试卷

平顶山学院-计算机科学与技术-离散数学