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9. Don’t look down upon Bob. He has his own advantages.
Oh， yes. ________ others are weak， he is strong.
A. If B. When C. Where D. Though
10. The day must be breaking， _____ the birds have begun singing.
A. because B. as C. for D. since
11. John may phone tonight. I don’t want to go out ________ he phones.
A. as long as B. in order to C. in case D. so that
12. ____others say， the expert is sure that his theory is correct
A. No matter B. It doesn’t matter C. Whatever D. What
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