Hfjchejkhcekrjfhckhkjfherkjfht

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Hfjchejkhcekrjfhckhkjfherkjfht

  1. 1. Welcome to my presentation Presenter: An Thu Huyen
  2. 2. The labor aredoing their work
  3. 3. Dispose garbage in Get garbage the forcus to gutter
  4. 4. Collection Waste paperCollection ofconstruction waste
  5. 5. Thankteacher and class for watching

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