Unit 13. buildings. building

Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
Unit 13. buildings.  building
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Author's Instructions

listen and follow directions.