__________twice,thepostmanrefusedtodeliverourlettersunlesswechainedourdog.
A.Being bitten B.Bitten C.Having bitten D.To be bitten正确答案B
__________twice,thepostmanrefusedtodeliverourlettersunlesswechainedourdog.
A.Being bitten B.Bitten C.Having bitten D.To be bitten正确答案B