根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余

A: Linda, are you free this evening?

B: Not really! Why?

A: Some of our classmates are coming to my home for dinner.

B: I' m afraid not.

A: At about eight o' clock.

B:

A: What about half past six?

B: Oh, I promised my brother I would help him with math at that time.

A:

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

A: You're welcome.

A. Sure, I'd love to. B. Can you come, too? C. OK, you are really busy. D. But when will the dinner start? E. I' m going to your house by bike. F. Thank you very much for asking me. G. Oh, sorry, I have a violin lesson at that time.