“承包人”用英语怎么说

谁是这条新高速公路的承包人?Who were the contractors on the new motorway ? ie Who built it?地板铺设和室外美化将由承包人来做.The flooring and landscaping will be done by contractors.当时国防部还不能直接与外界的承包人联系.In those days , the O . D . C . couldn't dea...