__________in the newspaper last week, the news of his wedding spread quickly in the city.

A．Having been announced

B．To announce

C．Being announced

D．To be announced

一幢34层（建筑高度97m）的普通塔式住宅，室内消火栓系统采用临时高压给水系统，水泵房设在地下一层，设有一部合用前室的剪刀楼梯间，问：

该建筑剪刀楼梯间的正压送风井合用能够，其正压送风量应按照（）楼梯间的风量来计算。

A、一个

B、两个

C、三个

D、四个