1. Do you have to/must you wear special shoes for aerobics?
2. You don't have to/mustn't eat a lot before exercising . It isn't good for you.
3.Joe was ill,so he had to/must miss football practice.
4. I don't have to/mustn't cycle to college,but I do it because I love cycling.
5.At my running club we have to/must jog slowly before we start running.
6.That was great!We have to/must play more often
7.These jogging bottoms don't fit me properly. I have to/must get some new ones.
8. Everyone can enjoy sport. You don't have to/mustn't be good at it