补全对话(共5分)
(根据对话内容,从对话后的选项中选出能填入空白处的最佳答案)
John: Oh, hi, Fred!   Why are you so late?
Fred:  She always keeps us in class until ten past ten.
John: Doesn't she know that you're supposed to get out at ten?
Fred: But she never looks at her watch. She just keeps talking.
John: Don't the students complain about it?  
Fred: No.
John: Well, you could try and talk to her.
Fred: Maybe.

A．They don't think so.

B．I didn't know whether to save you a place or not.

C．Everybody is too polite.

D．I guess so.

E. Mary had a talk with me.
F. It's our maths teacher.
G. I would say something.