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. I‘m so sorry I have been out the last three times you ______.
A. have called B. had called C. called D. have been calling
2. John did pass the test； ______ he didn’t know the subject very well.
A. in other words B. in the same way C. at the same time D. more or less
3. I thought her nice and honest ______ I met her.
A. first time B. the first time C. for the first time D. in time
4. By the time you get to San Francisco tomorrow， I ______ for Southeast Asia.
A. shall have left B. am leaving C. will leave D. have already left
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