Why were the Middle Ages called the Dark Ages?
Key: There were more knights in those days. Dark Ages本来是指欧洲中世纪早期的“黑暗时代”，而Middle Ages（中世纪）正是以骑士（knights）著称的时代。答案借助了knights和nights（夜晚）读音相同的特点，而且night和dark也相互呼应，非常巧妙。
