Jeff lives in a big city. His father has a shop there and his mother is a doctor. He is seven years old now and begins to go to school this autumn. It is a little far from their house and his father drives(驾驶)a car to take him to school every day. So he is never late for school and his teachers like him. It's Monday today. Miss Green is teaching students to count(数数)from one to ten. Jeff is studying hard. Soon(很快)he can count. Miss Green is happy and asks," How many people are there in your family?" Jeff stands up and says,"0,Miss Green." "Why?" "Mother, father and I are not at home now."
—She's a _______.