1·On this important feast day, people eat food in the shape of skulls and cakes with "bones" on.
在这个重要的节日里，人们会吃制成颅骨形状的食物，和装点有骨头的蛋糕。
2·On this important feast day, people eat food in the shape of skulls and cakes with 'bone' on them.
以……形状在这个重要的节日里，人们会吃制成骨头形状的食物和带有“骨头”装饰的蛋糕。
3·On this important feast day, people eat food in the shape of skulls and cakes with "bones" on them.
在这个重要的庆祝节日里，人们要吃骷髅形状的食物和有“骨头”的蛋糕。