根据短文内容判断正误

    This is a picture. It's a classroom. It is a big room. In the picture, you can see the teachers' desk, six desks, six chairs and a blackboard. You can see a boy and two girls, too.

    Two books are on the teachers' desk. A pencil-box is on the desk. Two pens and a ruler are in it. A bag is behind a chair.

    The boy is Jim. He is twelve. The girl in a hat is Lily. She is twelve, too. Another girl is Sue. She is twelve. The girls are twins(双胞胎).They are in Class 2, Grade 4. Their teacher is Mr. Green. He is not here.