U20-6 New Words and Expressions in Lesson 40
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U17-5 Dictation
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U17-2 Pronunciation
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U19-1 Listening and Understanding
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U17-3 Pattern Practice
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U16-2 Pronunciation
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U18-2 Pronunciation
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U18-3 Pattern Practice
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U16-4 Listening
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U16-3 Pattern Practice
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