为了确保G20杭州峰会的安全，公安、消防、交管等部门多次开展隐患排查和专项治理工作。与这些“正规军”协同作战的，还有一支超过76万人的平安巡防志愿者队伍。这些志愿者来自各行各业，他们作为G20的“东道主”“全天候”参与到社区管理和社会治理中来，发挥着“平安巡防员”、“信息收集员”、“纠纷调解员”的多重作用。

结合材料和所学政治生活知识，谈谈志愿者作为公民在参与社区管理和社会治理中如何正确发挥作用。

Wu Yifan ________ big eyes and small mouth.

完形填空

    　Mary and Peter were having a picnic near a river when Mary noticed something flying overhead.“ 1 ,” she shouted to her friends. “ That's a spaceship up there and it's going to 2 here.”

　　Frightened(吓唬) by the strange silver colored spaceship,3 of the young people got in their 4 and drove away quickly. But Peter5 Mary and always close to her. They, more 6 than frightened, watched the spaceship land, saw a door open. When nobody 7 , they went to the spaceship and looked into。In the center of the floor 8 was a pile of food. Peter followed Mary into the spaceship and didn't 9 the door close behind him. The temperature fell quickly and the 10young people lost consciousness(知觉).

　　When they woke up, they were 11to see that they were back by the river 12 . The spaceship had gone. Their car was nearby.

　　“What 13 ?” said Mary.

　　“Don't ask me; perhaps we had a 14 .”Peter said slowly. “Did you … did you see a spaceship?”

　　“Yes,” said Mary. “Oh, Peter, we 15 have seen a UFO coming from another world.”

读下图漫画“鲸吞农田”，回答下题。

解决漫画反映问题的有效措施有 （   ）
①控制人口增长  ②跨流域调水 ③保护耕地  ④垃圾分类处理