第一讲　　Lesson One Walking in Space

第二讲　　Lesson One Walking in Space

第三讲　　Lesson One Walking in Space

第四讲　　Lesson One Walking in Space

第五讲　　Lesson One Walking in Space

第七讲　　Lesson Two Education

第八讲　　Lesson Two Education

第九讲　　Lesson Two Education

第十讲　　Lesson Three Air Pollution

第十一讲　Lesson Three Air Pollution

第十二讲　Lesson Four Petroleum

第十三讲　Lesson Four Petroleum

第十四讲　Lesson Four Petroleum

第十五讲　Lesson Five Karaoke Bends to All Demands

第十六讲　Lesson Five Karaoke Bends to All Demands

第十七讲　Lesson Five Karaoke Bends to All Demands

第十八讲　Lesson Five Karaoke Bends to All Demands

第十九讲　Lesson Six Hackers Are Enemy Number One On The Inernet

第二十讲　Lesson Six Hackers Are Enemy Number One On The Inernet