1.1) Is a new restaurant very expensive?
2) Is a new or old restaurant very expensive?
3) What is restaurant very expensive?
4) What is very expensive?
5) A new restaurant is very expensive, is not it?
2. 1) Are they my good friends?
2)Are they my good or bad friends?
3) Who are my good friends?
4) What are my friends?
5)They are my good friends, are not they?