holiday/holy/vacation/vacuum/vacant/vague/vain/vanity/vocation/festival
记忆：
1. holy [ 5hEuli] adj. 神圣的, 圣洁的 Their attack on the holy city will arouse strong hatred among the Moslems 他们对圣城的攻击会在穆斯林中引起强烈的仇恨。
2. holiday [ 5hClEdi, 5hClidei ] holi - day，神的日子，要休假庆祝 n. 假日, 节日, 假期 We spent a very pleasant holiday in Chengdu.我们在成都度过了一个非常愉快的假日。
3. vacation [ vE5keiFEn;vei5keiFEn ] 词根vac 表示“空”，空的，不工作的 n. 假期, 休假, (房屋等的)腾出 Come to stay with us for the vacation. We are sure you will find it meaningful. 假期到我们这里来住我。我们相信你会度过一个有意义的假期。
4. vacuum ['vAkjuEm] n. 真空 No life can live in vacuum. 真空中不能存活生命。
5. vacant ['veikEnt] adj. 空的，未占用的 Sorry. We have no vacant room left for May Day. 对不起，五一节时我们没有空房间。
6. vague [veig] adj. 空泛的 I find the speech vague. 我觉得这演讲空洞。
7. vain [vein] adj. 没用的，徒然的 I’m afraid your efforts are in vain. 恐怕你的努力是徒然的。
8. vanity [ 5vAniti ] n. 空虚, 虚荣 Nothing can satisfy her vanity.什么也满足不了她的虚荣心。
9. vocation [ vEu5keiFEn] 词根voc表示“声音”voice, n. 召唤, 行业, 职业 Those who love their vocations live more happily than those who don’t.热爱自己职业的人生活得更快乐。
10. festival [ 5festEvEl ] n. 节日 adj. 节日的, 快乐的 Every nation has its own festivals. 每个民族都有自己的节日。
另类阅读：
When festivals come, we can enjoy holidays or vacation, staying away from our vocation.

轻松一刻
Professor Laurie of Glasgow put his notice on his door: "Professor Laurie will not meet his classes today." A student, after reading the notice, rubbed out the "c". Later Professor Laurie came along, and entering into the spirit of the joke, rubbed out the "l".（lass情妇 ass驴, 笨人）