根据上下文补全对话,将所缺少的内容写在相应的横线上。

Tony: Excuse me.1                                                ?

Mary: My hobby is reading story books, especially English stories.

Tony:2_____________________________________________?

Mary: Because it can help me develop the reading skills and learn knowledge (知识) as well. What's your hobby, Tony? 3                                                ?

Tony: No, I think it's hard to read books. I'm interested in playing computer games.

Mary:4                                                ?

Tony: One hour a day.

Mary: Really? So much time! I think5                                       .

Tony: Yes, you are right. I decide to do something new and different next school year.

以下哪种不是P2P网络的基本结构

A．集中式拓扑结构

B．分布式非结构化拓扑结构

C．分布式结构化拓扑结构

D．网状结构