Tag questions

Ex1: Tag questions
 1. Have another cup a coffee,....?
 2. Let us read it for you,....? 
 3. The Smiths have two cars,....?
 4. They used to play video games so much,...?
 5. Neither of them offered to help you,...?
 6.Nobody has lived in this houses for years,...?
 7. Everybody is here,...? 
 8. Nobody can answer the question,...?