Complete the conversation using : must, may, may not, can�t:
A: I�m going to do bungee-jumping next week�
B: Mum, you are 80!! You be mad. You be serious
A: No, I�ve always wanted to do it. It be amazing to fall from a height
B: But anything �happen. We �see you again because you have a terrible accident
A: I know it is very safe! It be as dangerous. My friend Fred has already done it. And he is older than me
B: His heart� be in a really good condition. But your heart be as healthy as you think
A: It is very healthy.. doctors told me. I know something happen but your life be much fun if you never try it. You try it. You like it!!
Complete the sentences using : must/can�t / might :