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1 уровень 1-c 2-b 3-c 4-b 5-c 2 уровень 1-throw away 2-protected 3-waste 4-environment 5-plant 3 уровень 1-protective 2-natural 3-ecologist 4-prediction 5-used 4 уровень 1.Volga runs into the Caspian Sea 2- 3-Kazbek is the highest peak of the Caucasus mountains 4.I have never been to the Lake Onega 5.Washington is the capital of the Unites States