阅读短文，选择正确的答案。

I have a dream. My classroom is in space（太空）. Liu Yang is my teacher. There are many cloudsnear the classroom. Open the door and see. The walls are blue and the floor is yellow. There are some desks and chairs in it. They are red. In the classroom, we can see a green blackboard, a red teacher's desk and four lights. Look! Many birds are on the windows. They are very cute. How beautiful the classroom is!