Katie: Hi, Alex. We are having fun at the beach.

Alex: What ____ everyone ____ (do)?

Katie:Ted          ____ (play) volleyball with Carol. Jenny and Henry____ (play) badminton. Grace ____ (fish). Ivan ____(swim) in the sea. Laura and Johnny____(lie) on the beach. Laura____(eat) an ice cream too. Jim  ____ (play) the guitar. And I ____ (talk) to you on the phone.

课内阅读。

小鸭子正在水里捉鱼，忽然，听见小公鸡喊救命。他飞快地游到小公鸡身边，让小公鸡坐在自己的背上。小公鸡上了岸，笑着对小鸭子说：“鸭子哥哥，谢谢你。”

伦敦奥运会期间英国军方将配备一种远程声波安保设备，该设备工作时可以产生高达150分贝的声音，尖锐的声响会让人耳感到刺痛，既可用作高音喇叭，也可用作非致命性武器驱散人群。关于该设备，下面说法正确的是（     ）

读“世界人口的分布”图，回答：