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. She was so surprised that she couldn't move. 结果状语从句
8. Tree after tree went down, cut down by water. 过去分词作状语
9. The next moment, the first wave swept her down, swallowing the garden. 现在分词作状语
10. However, before she could think twice, the water was upon her. It didn't take long before the building was destroyed. before的用法