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
Oh，look! There is a T-shirt here. It’s a school T-shirt. The owner must be a student.
Mary and sally lost their T-shirt. Could it be Mary’s or Sally’s? There is long hair on the T-shirt. But both of them have long hair. There is a photo of Liu Dehua in the pocket. Sally likes Liu Dehua very much, but Mary’s favorite star is Sun Yanzi. So, it belongs to sally. There is credit card too. Then, it must be sally’s school T-shirt because she is the only person who has a credit card in our school.