Keep your minds ________ to different ideas, or you will not be successful.

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 .On 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　 .shone 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

John was so sleepy that he could hardly keep his eyes ______.

A. open　　B. to be opened　　C. to open　　D. opening

John was so sleepy that he could hardly keep his eyes ______.

A. open　　B. to be opened　　C. to open　　D. opening

In the quiet darkness, I could hear someone _______ the door and go upstairs.

A. open     B. to open    C. opened   D. to be opening