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、短信提醒强调时间状语：It was last week that Jim met the student in the street.
(3) 注意点：
一般疑问句的强调句：
Was it Dr Wang who spoke to you just now?
特殊疑问句的强凋句：
Who is it that will visit our class?
Where is it that he has gone?
When was it that she went?
not … until … 用于强调句：
It was not until then that I realized I was wrong.
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