Choose the correct option.

1) My doctor told me to not / not to drink coffee.

2) When you go trekking, put on good boots in order / so that not to sprain your ankle.

3) Paul took up swimming so as / so that to stay in good shape.

4) They're organising a concert so that they can / could raise money for charity.

5) Kate attends yoga classes so as / so that she can feel better.

6) They trained every day so that they can / could belong to an emergency team.