阅读短文，回答问题
School starts tomorrow. My good friend Li Peng and I want to buy some school things. We go to the shop near my home. There are many students in the shop. Li Peng buys a green pen and two pencils, a black one and a red one. He buys a pencil box, too. My sister has a lot of pens and pencils, so I only buy some notebooks (笔记本)"Look! There is a nice watch on the floor. Is that your watch, Lin Tao?" Li Peng asks me.
"No," I say.
Then he picks up (捡起) the watch and asks the girl near us, "Excuse me, is this your watch?"
"No, my watch is at home," the girl answers.
Just then, & boy comes to us and says," It's my watch. My mother buys it for me as a birthday present.
"But how do we know it belongs to you?" asks Li Peng.
"There are two words on the back of the watch. They're Ma Jun, My name is Ma Jun," the boy says.
When we look at the back, we see the two words. So we give the watch to the boy.