to work overtime that evening, I missed a wonderful film.

A．Having been asked

B．Asking

C．Having asked

D．Being asked

室外消火栓按其设置方式分为地上式消火栓、地下式消火栓和（）。

A、墙式消火栓

B、消防竖管

C、消防上水鹤

D、水泵结合器