雅思口语天天练：看到标语要镇定　　not for sale非卖品; 　　wet paint油漆未干; 　　hands off请勿触摸; 　　lost and found失物招遥处; 　　suggestion box意见箱; 　　no litter勿乱扔杂物; 　　seat by number对号入座; 　　pets not allowed宠物禁止入内; 　　no visitors游人止步;watch your step小心脚下; 　　no honking禁止鸣笛