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Once there was a poor woman. She lived by herself in a little house in a village. She didn’t have much money_ 36_ she was very kind and happy.
One day a young man named Smith came to her door. He was a little thin and tall. He was very _37_ and asked the old woman for help.
The old woman said,“Come in and have dinner with me, but I only have _38_.” They had dinner together. After dinner, the old woman told Smith to _39_ some potatoes with him. He _40_ her and then left.
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