问题详情：
One day．Miss Ellis gave her pupils a new kind of homework：homework on happiness. Her pupils would be“happiness 36 ”，and were to see what would happen when they tried to bring happiness to 37 around them．As part of their homework，all the students did really delightful things, 38 what Carla Chalmers did left everyone surprised．Several days after the homework had been handed out，Carla turned up carrying a big 39 ．
“ 40 in this bag I have all the happiness I've collected so far，”she said 41 seeing this，everyone was filled with 42 ，But Carla didn’t want to show anyone what was in the bag． 43 ，she pulled out a small box and gave it to her teacher．When Miss Ellis had taken the box，Carla took an instant 44 out of her own pocket and stood with it at the ready.
“Open it，Miss Ellis．”
The teacher slowly opened the box and looked inside．A big 45 e on her face，and at that moment Carla took a photo，which came out of the camera 46 ，and she gave it to Miss Ellis along with a sheet of paper．The teacher read the paper 47 ，and when she had finished，she 48 at the bag．
“Oh，so it's…”
“Yes!” 49 ．Carla，opening the bag．“It's a great big pile of smiles!”
She opened the bag and 50 of different smiles fell out．
The rest of the class tried to 51 how Carla had managed to create such a great chain of happiness．All there in the 52 Was a photo of a big smile．But everyone who had seen it felt happiness being transmitted(传送)to them，and 53 ，without hesitation every person 54 with a smile of their own．
She managed to spread understanding of the 55 about smile：every time you smile you are sending a sift to the world．
36．A．explorers B．instructors C．players D．collectors
37．A．children B．relatives C．people D．teachers
38．A．for B．but C．since D．as
39．A．bag B．box C．photo D．toy
40．A．Where B．Here C．While D．Why
41．A．disappointedly B．sadly C．anxiously D．smilingly
42．A．astonishment B．kindness C．expectation D．pride
43．A．Instead B．However C．Again D．Quickly
44．A．calculator B．mobile phone C．camera D．pen
45．A．wonder B．smile C．surprise D．look
46．A．carefully B．immediately C．awkwardly D．casually
47．A．in time B．in tears C．in vain D．in silence
48．A．gestured B．shouted C．1aughed D．arrived
49．A．added B．questioned C．interrupted D．thought
50．A．drawings B．photos C．ideas D．millions
51．A．set out B．watch out C．hand out D．figure out
52．A．bag B．way C．box D．room
53．A．in return B．at last C．above all D．by the way
54．A．returned B．responded C．recovered D．remained
55．A．feeling B．expression C．form D．truth
【回答】
知识点：教育类
题型：完型填空
