情景交际：根据语境，用适当的语句完成对话。
Mother: You look a bit worried ,Tony. 1 ?
Son: l seem to be getting heavy these days.
Mother: That's a problem. Can I offer you some advice?
Son: 2 . What do you think I should do?
Mother: on the one hand, you should stop eating too much. on the other hand,_3 .
Son: Some of my friends have told me the same thing ,but l'm too busy to do exercise.
Mother: Then why not join a club on weekends?
Son: But 4 ?Mother: You'll can join swimming club. You want to learn to swim ,don't you?
Son: That's a good idea. Thank you , Mum.
Mother: 5 . I hope I will help.