互动封闭仿真课堂1、智能交互 2、电子板书式视频教学 3、5分钟一次互动问答 4、封闭课堂
How nice to hear from you again. Let me tell you something about the activity. I'm glad to have received your letter of Apr. 9th. I'm pleased to hear that you're coming to China for a visit. I'm writing to thank you for your help during my stay in America.
With best wishes. I'm looking forward to your reply. I'd appreciate it if you could reply earlier.
Ladies and gentlemen, May I have your attention, please? I have an announcement to make.
All the teachers and students are required to attend it. Please take your notebooks and make notes. Please listen carefully and we'll have a discussion in groups. Please come on time and don't be late.
Please come and join in it. Everybody is welcome to attend it. I hope you'll have a nice time here. That's all. Than