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3.1 Preview-Language points
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3.2 Part I Getting ready
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3.3 Part II Meeting announcements
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3.4 Part III Killing time
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3.5 Part IV Daylight -saving time
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3.6 Part V Radio announcements
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3.7 Part VII Can Time Move Backward?
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3.8 Unit 3 PPT
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3.9 video-how to learn English