"Come on, Dad! It's 7:20 a.m. now." says Steve.
"I need to wash the car now," Mr. Smith says. "You walk to your school this morning, OK?"
"But the school is far. I can't walk about 2 kilometers," says Becky.
"Walking is good. Now get your schoolbags and go!"
Then Steve and Becky walk to school. It takes 30 minutes. When they get to school, they are very tired.
In the evening, Steve and Becky have a big dinner with their grandfather. They tell him they are not happy to walk to school. Grandfather says, "That's good for you. I used to(曾经) walk for an hour and a half to school every day."
"Really?" Becky says. "But I don't like walking."
Grandfather says. "Kids need to walk or run every day. It's good for your health and you will be strong."
"Oh, I'll walk every day," Steve says. "I want to be strong."
"I will join you, Steve," says Becky.