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elementary school; (2) |
Ukrainian language; (2) |
младшие школьники; (2) |
молодші школярі; (2) |
начальная школа; (2) |
украинский язык; (2) |
українська мова; (2) |
ecological education. (1) |
elementary school students; (1) |
junior high school student; (1) |