1. (2019七上·宜春月考) 请阅读下面对话，根据对话内容补上所缺的句子，使句子通顺合理、意思表达明确。

A: I'm David

B: I am Anna. Good afternoon!

A:

B: It's an orange.

A:

B: O-R-A-N-G-E. 

A:

B: It's orange ,of course(当然).

A:

B: Yes, it's my orange.

A. No, it isn't. B. Thank you. C. Spell it, please. D. Good afternoon! E. What color is it? F. Is this your orange? G. What's this in English?