giving a speech

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    www.youtube.com , level=16, 4:58 , on 2019/06/09

movie ratings

Posted by 212158***, views: 9424,
    www.youtube.com , level=14, 5:51 , on 2019/06/09

Loch Ness Monster

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    www.youtube.com , level=8, 2:40 , on 2019/06/08

How to buy a ticket!!

Posted by 702167***, views: 9469,
    www.youtube.com , level=14, 0:56 , on 2019/06/08

Supply and Demand Explained in One Minute

Posted by dereco***, views: 9713,
    www.youtube.com , level=18, 0:54 , on 2019/06/08

Inflation Explained in One Minute

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    www.youtube.com , level=15, 1:10 , on 2019/06/08

advertising effect

Posted by 212158***, views: 9583,
    www.youtube.com , level=14, 7:45 , on 2019/06/08

urban landscape

Posted by 212158***, views: 9460,
    www.youtube.com , level=14, 4:00 , on 2019/06/08

the sun or the earth is at the center of the solar system?

Posted by 212158***, views: 9468,
    www.youtube.com , level=13, 5:17 , on 2019/06/08

the movement of population towards

Posted by 212158***, views: 9228,
    www.youtube.com , level=13, 5:48 , on 2019/06/07