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 concert will be held asschedule unless there is a typhoon.= The concert will be held as schedule ifthere is not a typhoon.
6. be afraidto do sth. 害怕干某事
I’m afraid to speak in front ofother people.
be afraid of sth. 害怕某事
He told me not to be afraid ofdifficulties.
be afraid that从句
I’m afraid that I can’t finish ontime
7. be angry withsb.
We were angry with him forkeeping us waiting.
be angry at/about sth.
He is angry at/about your answer.
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