A: Look, Grandpa! This is our.
B: Oh, it's beautiful. Is there a in your school?
A: Yes, there is. And there's a in my school.
B: It's wonderful. Are there any in your?
A: No, there aren't. But there are many and in my classroom.
A. 你的书包里有什么?
B. 你的学校里有一些教室吗?
C. 你的学校里有操场吗?
D. 那些是我们的教室。
E. 瓶子里有一些石头。