Unit 4,Then and now,Introduce,A:There was no library in my old school. B:Tell us about your school, please. A:How do you know that? B:There were no computers or Internet in my time,Words,star st:(r,作名词，意为“星，恒星，明星”。 eg: My star will be just one of the stars, for you. 我的星星对你而言，只不过是众星中的一颗。 I want my hair like this star. 我想要和这个明星一样的发型。 小练习:根据首字母填空：He is the s_ of our school. 拓展：movie star 电影明星； pop star 歌星，流行歌手； five star 五星级的，第一流的 red star 红星； new star 天新星（等于nova）；double star 双星（紧密相连的二颗星， 借望远镜始
