一天,愛麗絲小姐給學生們布置了一道新的作業(yè)：幸福作業(yè).要求學生們成為幸福的收集者,并觀察他們把幸福帶給身邊的人時,會發(fā)生什么結(jié)果.由于這只是部分作業(yè),全體學生都興高采烈地完成了.但卡拉.查爾莫斯的所作所為令所有人大吃一驚.作業(yè)交上去幾天了,卡拉背著一個大袋子出現(xiàn)在大家面前.On seeing this, everyone was filled with expectation, but Carla didn’t want to show anyone what was in the bag. Instead, she pulled out a small box and gave it to her teacher. When Miss Ellis had taken the box, Carla took a instant camera out of her own pocket and stood with it at the ready.見此情景，每個人都充滿了期待。但卡拉卻并不想讓大家知道袋子里是什么東西。她拿出了一個小盒子遞給了老師。愛麗絲小姐打開了盒子，卡拉從身上的口袋里取出了一架拍立得照相機，裝在三腳架上。