题目

补全对话。根据对话内容，从方框中选出适当的选项补全对话。A: Look, a CD is on the floor.【1】B: Let me have a look. Oh, it’s not a CD. It’s a movie DVD.A.【2】B: It might be Peter’s. I saw a DVD in his hand just now.A:【3】B: Action movies.A: But it’s a cartoon DVD.B: Oh, it could be Bill’s. He watched cartoons a lot.A: No.【4】 I saw Dave looking for something earlier today.B:Well, can the DVD be his? Oh, look!【5】A:Whose?B:Dave’s. A. Whose DVD is it? B. It has a name on it.C.What kind of CD is it? D.I think it might be Dave’s.E.What kind of 设各项均为正数的等比数列的前n项和为Sn，若S10=2，S30=14，则S40等于A．80 B．30 C．26 D．16