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Customers are asked to make sure that they ____the right change before leaving the shop.
A. will give
B. have been given
C. have given
D. will be given
As nobody here knows what is wrong with the machine, we must send for an engineer to ______ the problem.
A. handle
B. raise
C. face
D. present
If you keep on, you’ll succeed _________.
A. in time
B. at one time
C. at the same time
D. on time