阅读理解。

     I have a good friend. His name is Polly. He is 13. He is in Class Four, Grade Two. He has a small

sports collection. he has ten volleyballs, seven basketballs, five tennis rackets and four soccer balls.

He likes them very much. He doesn't play Sports. He only watches them on TV.

1. How many volleyballs does Polly have ?

A. Two.  

B. Three.

C. Ten.  

D. Five.

2. How many soccer balls does Polly have?

A. One.  

B. Two.

C. Three  

D. Four

3. Polly is in Class ____. 

A. Four  

B. Three  

C. Two    

D. One

4. Does Polly play sports?

A. Yes, he does.  

B. No, he doesn't.  

C. We don't know  

D. No, he does

5. How many basketballs does Polly have?

A. Ten 

B. Seven. 

C. Six.  

D. Two

FTTX+LAN是实现宽带接入的常用方法，基本结构如下图所示。

本方案采用DHCP来分配网络地址。DHCP是 (11) 协议的一个扩展，便于客户自动从服务器获取IP地址和相关设置，其中实现口地址动态分配的过程如下：

(1)客户设置服务器IP和IP地址，并发送服务器一个DHCPREQUEST报文。

(2)客户端向服务器广播DHCPDISCOVER报文，此报文源地址为 (12) ，目标地址为 (13) 。

(3)服务器返回DHCPACK报文。

(4)服务器返回DHCPOFFER报文。

客户收到的数据包应包含客户的 (14) 地址，后面跟着服务器能提供的IP地址，子网掩码，租约期限以及DHCP服务器的 (15) 地址。客户进行ARP检测，如果觉得有问题，发送DHCPDECINE报文，如果觉得没有问题就接受这个配置参数。

14（）