The Twin Towers (Present Perfect-Yet)

level = 14

0:26

on 2013/09/15

groups

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Paola (Present Perfect)

level = 14

0:22

on 2013/09/15

groups

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Common Cold - The Infographics Show

level = 15

1:33

on 2013/09/14

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The Strategizing Brain: Colin Camerer at TEDxCaltech

level = 21

0:16

on 2013/09/14

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Comment Could Settle Syria Crisis or Make it Worse

level = 11

4:13

on 2013/09/14

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Passenger - Let Her Go [Official Video]

level = 9

2:55

on 2013/09/12

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Ocean Storms Can Cause Great Damage

level = 10

1:49

on 2013/09/10

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The City of Brotherly Love, and Beantown

level = 10

3:58

on 2013/09/09

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kinh te VOA 1

level = 10

3:04

on 2013/09/07

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kinh te 2

level = 4

1:37

on 2013/09/07

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