11. What is the Swiss origin longest river that touches the land of Austria, Germany, France, Netherlands and Liechtenstein?
12. What is the year of Switzerland’s joining the League of Nations?
13. When did Switzerland become a country?
14. When the national flag of Switzerland officially adopted?
15. When was the Swiss constitution originally written?
16. Where is the headquarter of European Nuclear Research Organisation(CERN)?
17. Which country is going to host 2026 Winter Olympics?
18. Which European country hosted the 1954 FIFA World Cup?
19. Which nation defeated Switzerland in 1798?
20. Which Swiss city has the second-largest office of the United Nations?
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