ПОМОГИТЕЕЕ ПЛИЗ. Нужно вставить предлоги at,in,on #14

1. I live at 24 Primrose Street. 
2. My mother lives on a big block of flats in London
3. Janets flat is in the ground floor
4. "Where is the toilet, please?" "on the second floor"
5. "Is there a doctor near here?" "Yes, at 17 High Street"
6. They lived in America at 2000