Нужно выбрать правильное решение. Все предложения о будущем

1.If you pay / will pay the bill, / pay / I'll pay you back next week.
2.If I don’t / won’t do some exercise, I / I'll put on weight.
3.She isn't going to / doesn’t catch her plane if she doesn’t/ isn't going to leave soon.
4.What do / will you do if there is / there’ll be a traffic jam?
5.If we like / might like the hotel, we might stay/ stay a few more days.
6.They won't/ don’t enjoy the journey if they won’t / don’t get a seat.
7.Are you going to / Do you cook if I get / might get home late?