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The treatment will continue until the patient reaches the point where he can walk correctly and safely.
I think you have got to the point where a change is needed, or you would fail.
Government reports, legal papers and most business letters are the main situations where English is used.
He's got himself into a dangerous situation where he's likely to lose control of the plane.
The small mountain village where we spent our holiday last month lies in what /the place which is now part of Hubei.
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