选择合适的句子完成对话。

A. That rubber is blue. B. No, it isn't. C. It's under the chair. D. Is the rubber on that desk yours? E. Oh, it's beautiful, Helen.

A: Look! This is my new schoolbag.

B:

A: Thank you, Yang Ling. Oh, where's my rubber?

B: Don't worry(别着急). Is it in your pencil case?

A:

B:

A: No. My rubber is green.

B: Look!

A: Yes. Thank you.