从方框中选择恰当的句子完成下面的对话

A. Yes, it is. B. How do you spell it? C. Here you are. D. No, it isn't. E. Is this your clock? F. All right. G. Can you spell it, please?

A: Is this your ruler?

B:I think it's her ruler.

A: Emma, is this your ruler?

C:

A:

C: Thank you.

B: What's this in English?

A: It's a clock.

B:

A: No, it's Tom's.

B:

A: Yes. C-L-O-C-K.