单项选择题

This is a picture. It’s a classroom. It’s a nice room. In the picture, we can see five desks and six chairs. You can see a girl and two boys, too.
Three books are on a desk. A pencil-box is on the desk, too. Two pens and two rulers are in the pencil-box.
The girl is Lucy. She is eleven. One boy is Mike. He’s twelve. The other boy is Jim. He is ten. They are in Class 2, Grade 1. They’re good friends. Their teacher is Mr. Green. He isn’t here.
children are in the picture.