阅读理解。 This is a picture. It's a picture of the classroom. It is a big room. In the picture, you can see the teacher's desk, six desks, six chairs and a blackboard. You can see a boy and two girls, too. Two books are on the teacher's desk. A pencil case is on the desk. Two pens and a ruler are in the pencil case. A bag is behind a chair. Two cats are on the blackboard. The boy is Jim. He is nine. The girl in a hat is Lily. She is eight. The other girl is Sue. She is eight, too. The girls are twins. They are in Class 2, Grade 5. Their teacher is Mr. Green. He is not here. 根据短文内容，判断下列句子正(T)误(F)。 (     ) 1. This is a picture of a big classroom. (     ) 2. You can see two boys and a girl. (     ) 3. There are four books and a pencil case on the teacher's desk. (     ) 4. The bag is behind a chair. (     ) 5. Lily's teacher is in the picture, too.