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Beijing is the place where (in which) I was born. 北京是我的出生地。
Is this the reason why (for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗？
4. …only then did we decide to answer violence with violence. 只是在那时我才决定以暴制暴。
句首出现only then，谓语部分要部分倒装。
1) 句首为否定或半否定的词语，如no, not, never, seldom, little, hardly, at no time, in no way, not until… 等。Never have I seen such a performance. Nowhere will you find the answer to this question. Not until the child fell asleep did the mother leave the room.
2) 当Not until引出主从复合句，主句倒装，从句不倒装。
3) 注意： 如否定词不在句首不倒装。I have never seen such a performance. The mother didn't leave the room until the child fell asleep.
一站式课程咨询服务平台
