Recently, researchers in the US have carried out a study on laughing, one of the most natural characteristics of human behavior.
Jo-Anne Bachorowsky, a psychology professor at Vandebilt University, 36 a team of researchers who 37 a total of 11 short videos to 97 young adult volunteers in the US. They found that the participants produced a 38 of sounds when they laughed, 39 grunts(呼噜声) and snorts(哼声).
The researchers found that some of the 40 were dependent 41 gender(性别). Men laughed with grunts and snorts more often than women, 42 women’s 43 was more song-like.
They also found that people’s laughter could change, 44 who they were with at the time. Whether they were with a man or a woman and 45 person was a friend or a 46 both played a part in laughter.
The researchers found that women’s laughter was very high with a 47 pitch(音高) when they were with male strangers. And women taking 48 in the study laughed more often when they were with a male friend than when they were with a(n) 49 friend or a male stranger. But men laughed more freely with friends of either sex than with strangers of either sex.
Scientists believe that the 50 consumed in laughing 100 times is 51 to 15 minutes on an exercise bike. Another 52 of laughter is 53 it improves our mental health. Laughter reduces our levels of stress. It also helps us 54 serious illness.
55 ,we think laughter can make us feel good.
A．got B．led C．undertook D．worked
A．returned B．provided C．showed D．read
A．part B．case C．bit D．range
A．including B．containing C．having D．possessing
A．ways B．differences C．studies D．columns
A．on B．of C．with D．from
A．that B．when C．while D．how
A．cry B．sound C．voice D．laughter
A．depending on B．to depend on C．depend on D．depended on
A．other B．the other C．another D．others
A．passers-by B．relative C．stranger D．teacher
A．same B．similar C．various D．changeable
A．action B．part C．exercise D．duty
A．male B．young C．old D．female
A．food B．energy C．pressure D．memory
A．short B．easy C．equal D．good
A．way B．content C．intention D．benefit
A．why B．that C．how D．because
A．fight B．remove C．break D．deal
A．All along B．All the same C．In summary D．After all
In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources（资源） seemed to be 26 .
Today things are 27 , the world has become too 28 . We are using up our natural resources too quickly, and at the same time we are 29 our environment with dangerous chemicals. If we continue to do this, human life on the earth will not 30 .
Everyone 31 today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 32 , more and more fish are caught. We know that if too many trees are cut down, 33 will disappear and nothing will grow on the land. Yet, we 34 to use bigger and more powerful machines to 35 more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. ___36, in most countries wastes are 37 put into rivers or into the sea, and there are 38 laws to stop this. We know, too, that if the 39 of the world continues to rise at the present rate, in a few years there will not be enough food. What can we do to 40 these problems ?
If we eat more vegetables and less 41 , there will be more food available for everyone. Land that is used to grow crops 42 five times more people than land where animals are kept. Our natural resources will 43 longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth 44 .
Finally, if we educate people to think about the problems, we shall have a better and cleaner 45 in the future.
A．beautiful B．unlimited C．rare D．valuable
A．common B．the same C．changeable D．different
A．crowded B．small C．dirty D．busy
A．protecting B．saving C．polluting D．fighting
A．breathe B．survive C．drink D．move
A．wonders B．realizes C．considers D．discovers
A．poles B．boats C．methods D．ideas
A．mountains B．the sea C．trees D．forests
A．continue B．stop C．keep D．go on
A．grow B．plant C．save D．cut down
A．Thus B．However C．But D．Therefore
A．still B．even C．also D．certainly
A．too many B．a few C．some D．few
A．production B．pollution C．population D．pronunciation
A．work B．deal C．solve D．serve
A．fruit B．meat C．fish D．grain
A．feeds B．increases C．supplies D．helps
A．use B．stay C．keep D．last
A．control B．born C．plan D．reward
A．nature B．sea C．planet D．forest
Nancy Volk operated a sidewalk cafe in Anoka, Minnesota to support her family.
Dan Heins, one of the cafe’s regular customers, had a 36 : kidney dialysis（肾透析） from 6 to 10 a.m on Tuesdays, Thursdays, and Saturdays, after 37 at the cafe. The 56-year-old owner of the small cafe, Nancy 38 that Heins' diabetes(糖尿病)was 39 for his kidney failure and the cut-off of his leg. And Dan knew that Nancy, a single mother with three daughters, worked two other jobs to 40 the cafe open and meet her housing loans.
One morning as he ordered his breakfast, he 41 he would be on kidney dialysis the rest of his life if he didn't receive a(n) 42 . Nancy didn't hesitate, simply saying “I’ll donate”. A normal 43 volunteered to give him an organ? It seemed 44 to Dan, and Nancy had to spend a few weeks 45 him she was serious. The day before Thanksgiving in 2009, the results of the medical tests came in: She was a 46 .
While they were 47 the transplant, Dan’s other leg was cut off and Nancy’s financial 48 grew from bad to worse.
Nancy decided to close the cafe last September much 49 she loved it. At the same time, her home was going into 50 . Dan's insurance would 51 her surgery costs, but she was worried too much that she wouldn't be able to work the part-time jobs for six weeks.
Steve Ohlsen, another customer of the cafe, 52 a donation box near the register. In less than one month, people gave Nancy several thousand dollars—enough to ensure 53 on her home while she recovered.
Nancy and Dan had their 54 in September. Four months later,Dan is 55 dialysis, and Nancy has sent thank-you notes to her supporters.
A．way B．service C．route D．routine
A．breakfast B．supper C．lunch D．dinner
A．guessed B．knew C．imagined D．concluded
A．serious B．impossible C．responsible D．important
A．keep B．run C．cause D．want
A．shouted B．murmured C．smiled D．informed
A．operation B．surgery C．transplant D．transfer
A．friend B．relation C．shopkeeper D．student
A．exciting B．unreal C．unusual D．moving
A．cheating B．convincing C．informing D．involving
A．match B．partner C．companion D．mate
A．searching for B．waiting for C．looking into D．taking in
A．position B．profession C．situation D．condition
A．although B．while C．though D．when
A．trouble B．business C．service D．luck
A．offer B．provide C．give D．cover
A．made B．laid C．placed D．set
A．payments B．expenses C．repairs D．fees
A．personalities B．supporters C．surgeries D．lives
A．off B．down C．up D．to
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