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11. I insisted that he ________ (go) at once.
12. If he ________(pass) the exam, his father ________ (buy) him a computer.
13. Certainly I posted your letter—I remember _________ (post) it.
14. She ________ (fall) in love with the house as soon as she saw it.
15. As he _________ (read) the newspaper, Granny went out quietly.
16. I look forward to ________ (receive) your reply as soon as possible.
17. They ________ (listen) to the teacher attentively (专心地) when the bell _______(ring).
18. We couldn’t decide whether ________ (buy) the red one or the blue one.
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