阅读短文，选择正确答案。

My name is Mary Green and I’m an English teacher. I am American. But I have many students here in China.

The girl in the red coat is Lin Hong. She is twelve. She is in Row One. Behind her is Lucy, a new student. She is English. Her father, Mr Black is a teacher of English, too. The boy in the green sweater is Li Lei. He is on duty today. He is thirteen. His father is a policeman.