Answer the questions. 1. How old is Ilya? 2. Is travelling Ilya's hobby? Find and read phrases in the text to prove it. 3. At what age did he start travelling? 4. Where did Ilya go last summer? 5. What language did the teenagers speak during the expedition?

Unfortunately, the provided text does not contain enough information to answer these questions. The text only provides some details about Ilya's travels, such as his recent trip to Sweden and his upcoming trip to Italy, but it doesn't mention his age, whether traveling is his hobby, or when he started traveling. The text also does not provide any information about where Ilya went last summer or what language the teenagers spoke during the expedition.