Find and correct the mistakes: 1. volga is the longest river in europe. 2. we went to alps last winter. 3. the scientist was awarded nobel prize. 4. my friend bought the watch in the switzerland. 5. i have recently visited hermitage in st. petersburg. 6. president represents the legislative branch. 7. who is the head of state in usa? 8. you should visit the red square.and the kremlin. 9. they went to the lake baikal last summer. 10. the queen victoria ruled 64 years. 11. russia is largest country on earth. 12. russia have been known as russian federation since 199j. 13. before that russia was one of the republics of ussr. 14. its nearly twice the size of usa. 15. nearly 150 millions people live in russia. 16. volga is longest river in europe. 17. the mount elbrus is in caucasus. 18. almost 10 per cents of russia is tundra. 19. there aren't no trees in desert. 20. russia has always played a important role in the world.