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 题目和参考答案——青夏教育精英家教网—

题目内容

______ 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

解析:

略

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B．they have a sharp blade to cut leaves

C．other members are busy with other work

D．they can finish the job in a better organized way

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