1."You will pay me the money back, _________?"
2."She's a very good driver, _________?"
3."There were so many people on the train, _________?"
4."You shouldn't talk with your mouth full, _________?"
5."You couldn't give me a lift to the station, _________?"
6."It's a lovely day, _________?"
1) a, 2) b, 3) d, 4) b, 5) a, 6) b.