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29. I’ll never forget the days ______I lived in the country with the farmers, ____ has a great effect on my life.
A. that; which B. which; that C. when; which D. when; who
30. ----Need I clean the room now?
----Yes, you _____ , but you ______ ask someone to help you.
A. need, need B. must, can C. need, can D. must, need
答案：
B D B C A B C C C C A B D C B
D D B B D B C A C A C B C C B
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