根据对话内容，从对话后所给的选项中选出可以填入空白处的最佳选项，选项中有两项为多余选项。

A: Hello!

B: Hello!

A: I'm sorry he's not in at the moment. Who's calling, please?

B: Is that Mrs. Smart?

A: Yes, Jack, Tony has gone to visit the museum with his father.

B: Sure. You know, we won a basketball match, so we are going to have a party to celebrate it in my home.

A: Great!

B: At 6:30 tomorrow evening.

A: OK. I'll tell him about it.

B:.

A: You're welcome. Goodbye, Jack.

B: Bye, Mrs. Smart.

A. It doesn't matter. B. This is Jack speaking. C. Thank you very much. D. Can I take a message? E. Just hold the line, please. F. When will the party begin? G. May I speak to Tony, please?