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Day 7: keep up with Index: 0:12 Introduction. Listen to the phrasal verb in context. 0:32 Identify the meaning. 1:03 Explanation. Study its meaning and use. 2:51 Question of the Day. 3:06... |
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JenniferESL
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Time: 05:55 | More in Education |
원문출처 : http://www.youtube.com/watch?v=nGq3IFyG2LU&feature=youtube_gdata