阅读下面短文，在空白处填入 1个适当的单词或括号内单词的正确形式。Undoubtedly, Britain is a nation of hat wearers. From taking off hats 【1】 launching mortar boards(学位帽) in the air, hats have long been associated with ceremonies and practices. Even the history of the country can 【2】(tell) through hats.【3】(date) back to medieval England, the flat cap became a symbol of working class culture in the 19th and 20th centuries. The Edwardian era was 【4】 golden age of hats, when the decorations became even more delicate, ranging from flowers, birds to