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You have waited 45 minutes for the valuable 10 minutes’ break between classes. But when the bell for the next class rings, you can’t believe how ___41__ time has passed.
If you are ___42___ with this scene, you’ll know how time flies when you are having fun and __43__ when you are bored. Now scientists have ___44___ a reason why this is the case.
Scans have shown that patterns of activity in the brain ___45___ according to how we focus on a task. When we are ___46___ ,we concentrate more on how time is passing. And ____47___ makes our brains think the clock is ticking more slowly.
In an experiment ____48___ by a French laboratory, 12 volunteers watched an image ___49___ researchers monitored their brain activity.
The volunteers were told to __50____ concentrate on how long an image appeared for, then ____51___ the color of the image, and thirdly, study both duration（持续时间，期间） and color. The results showed that ___52__ was more active when the volunteers paid attention to ___53__ subjects.
It is thought __54____ if the brain is focusing on many aspects of a task, it has to ___55__ its resources, and pays less attention to the clock. ____56__, time passes without us really __57___it, and seems to go quickly. If the brain is not so active, it concentrates its ___58____ energies on monitoring the passing of time. __59__, time seems to drag.
Next time you feel bored __60___, perhaps you should pay more attention to what the teacher is saying!
41. A. slowly B. quickly C. terribly D. foolishly
42. A. disappointed B. satisfied C. familiar D. similar
43. A. drags B. stops C. goes D. backs
44. A. thought over B. made up C. suggested with D. come up with
45. A. change B. develop C. grow D. slow
46. A. sleepy B. bored C. excited D. active
47. A. which B. we C. this D. what
48. A. produced B. carried out C. tried D. did
49. A. where B. when C. while D. as
50. A. partly B. quickly C. how D. first
51. A. familiar with B. focus on C. make out D. tell apart
52. A. the researchers B. the experiment C. the clock D. the brain
53. A. no B. less C. some D. more
54. A. when B. which C. that D. where
55. A. fix B. gather C. reach D. spread
56. A. However B. Furthermore C. Therefore D. Finally
57. A. recognizing B. watching C. noticing D. counting
58. A. enough B. full C. right D. proper
59. A. In fact B. As a result C. For example D. Instead
60. A. in class B. with work C. in mind D. of lessons
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