题目内容：

We have a nice and big classroom. There is a big blackboard on the wall. There are three pictures on the wall, too. There are six windows in the wall.

There are nineteen boys and eighteen girls in our class. There are thirty-seven small desks and chairs in the room. They are all for the students. There is a big desk for the teachers.

根据短文内容判断下列句子正误，正确的写A，错误的写B

1.We have a very small classroom.

2.We have a big blackboard on the wall.

3.There are three big windows and six pictures.

4.There are nineteen girls in our class.

5.There are thirty-seven students in our class.