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A: It’s very late. Are you still on the computer?
B: Well, yes. 26
A: What kind of e-mails?
B: Some are messages from my friends and some
are from the relatives.
A: 27
B: Of course! Usually people want a quick reply.
A: 28
B: I’ve already had 40 people’s addresses in my
address book! 29
A: 30 E-mail is really very convenient(方便的).
( )21. A. in B. by C. on D. with
( )22. A. people B. teachers C. children D. workers
( )23. A. slowly B. hardly C. quickly D. carefully
( )24. A. not B. and C. but D. then
( )25. A. first B. earlier C. before D. later
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