Unit 3 What were you doing when the UFO arrived?

unit 3 what were you doing when the ufo arrived? 
 

一、知识点拨
i．language goals
•学会过去进行时的基本结构与用法
•学会简单描述过去发生的事情
•学会讲简单的故事
ii．key words
1．cut v．切；剪；割
   be careful．don't cut yourself．小心，别切到自己。
2．alien n．外星人
   nobody knows whether there are aliens or not．没人知道到底有没有外星人。
3．land v．登岸；登陆；降落
   the plane will land in ten minutes．飞机将在十分钟后降落。
4．while conj．当……的时候；在……之时
   while i danced, she sang．我跳舞，她唱歌。
5．right adv．正好；恰好
   the accident happened right over there．事故正好发生在那里。
6．surprised adj．惊奇的；吃惊的
   i was surprised that he was late for the party．我很惊讶他聚会居然迟到了。
7．kid v．欺骗；哄骗
   i'm not kidding you．我没有骗你。
8．anywhere adv．到处；无论哪里（用于否定句中）
   did you go anywhere yesterday? 你昨天去没去过什么地方?
9．happen v．发生
   a funny thin