本课程为收费课程，购买后即可观看完整内容
-
- 00:00 付费001_Safety rules
- 00:00
付费002_What are you doing_ - 00:00 付费003_Would you like ..._
- 00:00 付费004_What are they doing_
- 00:00 付费005_A Famous City—Beijing
- 00:00 付费006_The Great Wall
- 00:00 付费007_How much is it_
- 00:00 付费008_The experience of salesgirl
- 00:00 付费009_What did you do last weeken ...