补全句子。

1. Do you _____ working _____ groups helpful?

2. My favorite English class activities are doing grammar _____ and _____ videos.

3. I prefer _____ class activities _____ a partner.

4. When I am working _____ a group, I take _____ and _____ the group.

5. I memorize new words better if I listen to them _____ and _____.

6. When I speak English _____ loud, I sometimes worry about _____ mistakes.

7. Before I say something in English, I think _____ it in Chinese, and then _____ it.

校园网对校内提供VOD服务，对外提供Web服务，同时进行网络流量监控。对以上服务器进行部署：VOD服务器部署在 (3) ；Web服务器部署在 (4) ；网络流量监控服务器部署在 (5) 。
备选答案：

A．核心交换机端口
B．核心交换机镜像端口
C．汇聚交换机端口
D．接入交换机端口
E．防火墙DMZ端口
以上三种服务器中通常发出数据流量最大的是 (6) 。