“广告牌”的英语？

他们不允许在体育场周围设广告牌。They don't allow signage around the stadium.他们叫他对天发誓说他一定要去弄块广告牌.They swear him to go and get a bulletin - board.他们成为正式赞助者,从而能在赛场周围的墙上挂上他们公司的广告牌.They become official sponsors and put their logos on st...