Our company headquarters----(be) in Boston.里面应该填什么?

headquarters [,hed'kwɔ:təz] n. 总部；司令部；指挥部
不是动词 Our company headquarters 做整体 应填 is
例句：. The headquarters is set up in USA, but there are offices all over the world.
这家公司的总部设在美国,但在世界各地都设有办事处.