Nancy is an English school girl. She studies (学习) in a middle school. She has a little brother. His name is John. John is only four. Nancy likes him very much. Today is Sunday. Nancy wants to do her homework. She takes out (拿出) her pencil-box and opens it. "Oh, dear! Where's my pen?" She can't find her pen. She goes to ask her brother in his bedroom.

"John! I can't find my pen. Can you see…? Oh, what are you doing with my pen?"

"I'm writing (写信) to my friend, Peter. "John answers.

"But how can you? You don't know how to write!"

"It doesn't matter (没关系). Peter can't read. "John says.