互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒1. Functional Items：Ways of giving advice or making suggestions.
2. Topic：Talking about cultural relics, including ways of protecting them.
3. Word-formation：“re V.”(eg. rebuild, replaced, recreate).
4. Key words and expressions：select, represent, in history, be kept as, give in(up), in ruins,
in pieces, bring … back to life, etc
5. Structure (Grammar)：The Passive Voice (I) — The Present Perfect Passive Voice
6. Writing：Write a letter to the editor on a certain cultural site, suggesting ways of
protecting the cultural relics.
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