题目

请阅读下面对话，根据对话内容补所缺句子，使对话通顺，合理，意思完整，有两个为多余选项。（每空一句）（Mike=M Tom=T）M: How are you, Tom?T: Very well, thanks. How are you?M: I'm Ok..T: Is this your pencil box?M:. It's Dale's.T: What about this one?M:T: What color is your pencil box?M:T: I think it's on your desk.M: Really(真的)? Ah, yes. It's here.T: You're welcome. A. It's white. B. Yes, it is. C. It's in the desk. D. But I lost my pencil box. E. It isn't my pencil box, either. F. Thank you. G. No, it isn't.某铁路线上有25个大小车站，那么应该为这条路线准备多少种不同的车票？