(Joe and Bill played basketball last night．)
A：Hey, Joe! How do you feel today?
B：I'm feeling good，Bill．I have more energy(精力)today!
A：That's great．You can p with me every week．
B：Maybe I will．I want to try other spots，too，like running or s．
A：I know a good place to swim．It's not far from our apartments．
B：Really? That's good．
A：So w do you want to exercise so much?
B：I want to have more energy．I also want to feel stronger．
A：I see．Did you p in primary school?
B：Yes，but later I got lazy and stopped exercising．
A：Well，it's a good idea to s again!
