When their first child was born, they _________ for three years.

A．had married

B．had been married

C．got married

D．had got married

审核本职业施工项目的施工方案和安全措施时，主要有以下几个方面的内容（）。

A.工艺技术可行性

B.质量安全措施可行性

C.施工机械操作性

D.经济合理性