Unit 1　Laughter is good for you
(主题语境:人与自我——做人与做事)

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高频单词
重点短语
难点句型
1.previous adj.先前,以往[高考佳句] For previous generations,college was a decisive break from parental control.(·北京卷,阅读了解)对于前几代人来说,大学是摆脱父母控制决定性突破。previous to在……之前previously adv.事先;以前四维热练(1)　　　　　 care-related experience will be a great advantage for you.以前与护理相关经验对你来说是一个很大优势。(2)No one in the carriage had　　　　　　 spoken to the ticket-owner before.事先车上没人和这个持票人说过话。
Previous
previously