摘要
开场白!乔的父母上个月来看他，他们走了很多路，也爬了很多的楼梯!乔都喘不过气了，他不常运动，他喜欢体育活动，但却不会上场去打球。卡萝会做运动，她走路，也跳舞，她或许可以给乔一些建议。
Let＇s begin! Why should people exercise？ Rob and a guest talk about how exercise helps people＇s bodies. It keeps people fit. Also, people who exercise may not develop serious illnesses. Exercise is also good for stress because it helps people to relax.
