1. Did your friend's family go to the Black Sea by train last summer?
2. Last summer your friend’s family went to the Black Sea by train, didn't they?
3. When did your friend’s family went to the Black Sea by train?
4. Who went to the Black Sea by train last summer?
5. Where did your friend’s family go to the by train last summer?
6. What did your friend’s family go to the Black Sea last summer by?
7. What sea did your friend's family go by train last summer to?
8. Whose family did go to the Black Sea by train last summer?