注意：此页面搜索的是所有试题
______ 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
A、 Being bitten
B、 Had been bitten
C、 Having bitten
D、 Having been bitten
参考答案