完成对话，从方框中选择正确选项，其中有一个选项与对话内容无关。

A. At about eight o'clock. B. Thank you very much for inviting me. C. Not really. D. I'm going to your house by bike. E. Would you like to come? F. What about half past six?

A: Gina, are you free this evening?

B: Why do you ask that?

A: Some of our classmates are coming to my house for a party.

B: When will the party start?

A:

B: Oh, sorry, I will have a violin lesson then.

A:

B: I'm very sorry. I promised to help my brother with his math at 7:00 p.m.

A: OK. You are really busy.

B: But I will come over to your house next time.

A: You're welcome.