问题描述：
1.___ 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
2.（） not to miss the flight at 15:20,the manager set out for the airport in a hurry.
A.Reminding B.Reminded C.To remind D.Having reminded
第一题选A,第二题选B,为什么第一个要加being,第二个不加呢?
A.Being bitten B.Bitten C.Having bitten D.To be bitten
2.（） not to miss the flight at 15:20,the manager set out for the airport in a hurry.
A.Reminding B.Reminded C.To remind D.Having reminded
第一题选A,第二题选B,为什么第一个要加being,第二个不加呢?
问题解答：
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