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7.________________ my sister ________ first had the idea to cycle along the entire Mekong River from where it begins to where it ends.
首先想到沿湄公河从源头到终点骑车旅游的是我的姐姐。
答案：It was;who
Ⅰ.用括号内所给单词的适当形式填空
1.His inability to speak English puts him at a(n)__________(advantage) when he attends international conferences.
答案：disadvantage
2.__________(final) he realized that it was he himsel f who was wrong.
答案：Finally
3.He was__________(determine)that the same mistakes would not be repeated.
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