This afternoon Alan and Frank do their homework in Mike's house. At five, Mike and Alan go and play baseball. Frank can't play it. He doesn't go with them. He sees some things on the desk. "Let me tidy it up(整理),"Frank says. "The black pencil and the yellow eraser are Mike's," he says and puts them in Mike's schoolbag. Then he puts the green pencil and the purple ruler in Alan's schoolbag.
At six, Mike and Alan come back(回来).
"Where is my green pencil?" Mike asks.
"It's in my schoolbag. Is my black pencil in your bag?" Alan says.
"Yes, it is. And your yellow eraser is in my schoolbag, too," says Mike.
"I'm sorry, boys," Frank says.
"That's all right, Frank. We should thank you. Next time we will tidy up the desk," Mike says.
