根据短文选择答案。
Sam lives in New York City. His father has a shop there, and his mother is a teacher. He is seven years old now and begins to go to school this autumn. The school is a little far from their shop, so his father drives him to school every day. He is never late for school and his teachers like him. It's Monday today. Miss Hunt is teaching the students to count(数数) from one to ten. Sam studies hard. Soon he can count them. Miss Hunt is happy and asks, “How many people are there in your family, Sam?” Sam stands up and begins to count with his fingers. Then he says, “Two, Miss Hunt.”“Who are they?”“My father and mother.” “Oh,”Miss Hunt is surprised and says, “There are three people in your family!”“But now I’m not at home. I'm at school, you know!”