1. He asked if most of the immigrants came from Europe.
2. She asked why so many immigrants had come to USA.
3. I asked if they had eaten something...?
4. I wondered what had they eaten...?
5. She asked me if I had ever visited.......
6. He asked me if something had happened during the year.
7. I wondered if ther was something turned off.
8. She asked me if the lights were switched on.
