-- Have you seen ______pen? I left it here this  morning

-- Is it ______black one? I think I saw it somewhere

A．a；the

B．the；the

C．a；a

D．the；a

施工项目部在进行主要材料或构配件、设备投标前，应将拟采购供货的生产厂家的资质证明文件报监理项目部审查。