补全对话。

A: Linda,Is it big?

B: Yes, it's really big. There are thirty students in my class.

A: There are forty students, twenty boys and twenty girls. What's in your classroom?

B: Yes, there is.

A: Are there computers on everyone's desk?

B:But there is a computer on the teacher's desk.

A:

B: Yes, there are, at the front of the classroom.

A. No, there aren't. B. what's your classroom like? C. But there aren't any pictures on our classroom walls. D. There is a map of England in our classroom. E. How many students are there in your class in Beijing? F. Is there a lot of furniture? G. Oh, are there any pictures on the classroom walls?