9．Does solving a math problem give you a headache？Do you feel nervous when you sit a math exam？For most students，math can be tough but scientists have proved that math problems can actually trigger（引起） physical pain．
Scientists came to this conclusion with an in-depth experiment，which was published in the Public Library of Science One journal．They began by finding out how much participants fear math．Those involved were asked a series of questions such as how they feel when they receive a math textbook or when they walk into a math lesson．
Based on their answers，participants were divided into groups．One group was made up of people who were particularly afraid of math and participants in the other group were more comfortable with the subject．
Both groups were then given either math tasks or word tasks．When a math task was going to come next，a yellow circle would appear but when a word task was soon to come，a blue square would be shown．
Using a brain-scan machine，scientists noticed that whenever people from Group One saw a yellow circle，their brain would respond in a way similar to when their body is feeling pain．It was like the pain they would feel，for example，if they burnt their hand on a hot stove．But they reacted less strongly when they knew that they would be faced with a word task．
However，scientists saw no strong brain response from people in the second group．
Math can be difficult，and for those with high levels of mathematics-anxiety （HMA），math is associated with tension，apprehension（忧虑） and fear．"When you are really thinking about the math problems，you r mind is racing and you are worrying about all the things that could go wrong，"explained Ian Lyons from University of Chicago，US，leader of the study．"The higher a person's anxiety of a maths task，the more he activated brain regions associated with threat detection，and the experience of pain．"
More interestingly，the brain activity disappeared when participants actually started dealing with the math tasks．"This means that it's not that math itself hurts； rather，the expectation of mathis painful，"Lyons said．
Based on the study，scientists suggested that things could be done to help students worry less and move past their fear of math，which might mean they perform better in tests．
72．In the first stage，scientists ask participants some questions toB．
A．see whether math hurts                  
B．find out how much they fear math
C．observe how their brain response            
D．test their endurance of pain
73．The underlined word"the expectation of math"is closest in meaning toD．
A．the attempt of learning math                
B．the motivation to work out math problem 
C．the effort to understand math               
D．the act of thinking about math
74．Which is the best title for the passage？C
A．How to overcome math fear．
B．Physical pain affects math performance．
C．Math pain in your brain．
D．Unknown truth about pain．
75．What can be concluded from the experiment？D
A．The expectation of math has no relation to students'confidence in math．
B．Moderate mathematic anxiety improves students'academic performance．
C．Effective solutions have been worked out to lower students'anxiety of math．
D．Physical pain caused by HMA disappears in the process of doing math problem．

8．There are two factors which determine an individual's intelligence．The first is the sort of brain he is born with．Human brains differ considerably，some being more capable than others．But no matter how good a brain he has to begin with，an individual will have a low order of intelligence unless he has opportunities to learn．So the second factor is what happens to the individual-the sort of environment in which he is reared（抚养）．If an individual is handicapped environmentally，it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable．
The importance of environment in determining an individual's intelligence can be demonstrated by the case history of the identical twins，Peter and Mark．Being identical，the twins had identical brains at birth，and their growth processes were the same．When the twins were three months old，their parents died，and they were placed in separate foster（寄养） homes．Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities．Mark was reared in the home of well-to-do parents who had been to college．He was read to as a child，sent to good schools，and given every opportunity to be stimulated intellectually．This environmental difference continued until the twins were in their teens，when they were given tests to measure their intelligence．Mark's I．Q．was 125，twenty-five points higher than the average and forty points higher than his identical brother．Given equal opportunities，the twins，having identical brains，would have tested at roughly the same level．
65．According to the passage，the average I．Q．isB．
A.85               
B.100             
C.110                     
D.125
66．This passage suggests that individual's I．Q．D．
A．can be predicted at birth                    
B．is inherited from his parents
C．stays the same throughout his life           
D．can be increased by education
67．This passage can best be titledB．
A．Measuring Your Intelligence              
B．Intelligence and Environment
C．The Case of Peter and Mark               
D．The Introduction of the I．Q．Test．

7．

A．majority      B．involving    C．association     D．visible       E．wearing  F．distraction     G．attentively    H．fatal          I．specifically    J．needed

People who wear headphones might want to throw them away while walking outside．A study finds that accidents involving walkers （41）Ethe devices have increased three times in recent years．
Researchers searched the National Injury Surveillance System，the U．S．Consumer Product Safety Commission，Google News archives and Westlaw Campus Research，and they found 116 cases of death or injury （42）Bwalkers with headphones．Cases in which people were using mobile phones （including hands-free devices） were not included．
Over the years the number of cases increased，from 16 in 2004 and 2005 to 47 in 2010 and 2011．The victims'average age was 21，and most （68%） were male．The （43）A （ 67% ）  were under the age of 30．Most （55%） were hit by trains，and 70 percent of the crashes，most of which were in urban areas，were （44）H．
In 74 percent of the cases，police or eyewitness reports said the walker had headphones on when hit．And 29 percent of reports made mention of horns or warning bells going off before the crash．
The study authors pointed to two likely causes that may be a factor in what they call"the possible （45）Cbetween headphone use and walker injury"：sensory deprivation（感官剥夺） and （46）F．The latter is more （47）I called"inattentional blindness，"referring to the use of electronic devices and how they decrease attention to things going on around us．
Hearing what's going on in the environment，they point out，could be more important than  （48）Dclues for walkers．But the authors add that this study doesn't show cause or relationship of headphone use and walker risk，and other factors could have been involved in the accidents，such as walkers being intoxicated（陶醉）or drivers being at fault．
More comprehensive information on such accidents is（49）J，the researchers said，to see which groups of people may be most at risk．

6．The boy withwhomJohn spoke is my brother．

5．Sit up straight．Say please and thank you．Don't put your elbows on the table．Most of us were drilled from an early age in proper manners and etiquette．But manners and etiquette （33）canvary widely in different cultures．
Take table manners for example．In many parts of the world，it's considered rude to make noises when eating．The Japanese，however，think it customary to make some slurping（啧啧的） noises while eating noodles．They say the noodles taste better．A person who eats noodles （34）withoutmaking any sound could seem strange in Japan．
Another interesting cultural difference is portrayed in a TV advertisement （35）set（set） in an Asian city．It shows an Asian family inviting a westerner to dinner．The Asians prepare a lot of food to show the guest （36）theyare hospitable（殷勤好客的）．Westerners are taught to"clean their plates"and think it's impolite to leave food in the dishes．So the guest tries to finish his meal without leaving （37）anythingon his dishes．However，an Asian host sees an empty dish as a sign （38）thatthe guest wants more food．In the ad，the host immediately prepares more food for the guest，who tries to finish his food again just to show his manners．It becomes a circle of misunderstanding．
Differences are also seen in other aspects．While extending a hand to shake the hand of a person you're meeting with （39）seems（seem） to most of us a universal way of showing friendliness，an Orthodox Jew （东正犹太教徒） will not shake hands with someone of the opposite sex．Similarly，a strict Muslim woman will not shake hands with a man，though a Muslim man will shake hands with a non-Muslim woman．People in these cultures generally avoid （40）touching（touch） people of the opposite sex who are not family members．

4．Which day of the week is the happiest？Which is the most depressing？In order to find （25）theanswers，some experts studied 22，000 people over two months．The data was collected  by （26）sending（send） messages to their mobile phones twice a day，asking them（27）howthey felt，（28）whothey were with，where they were，and what they were doing．
According to the study，our moods are at their brightest on Saturday and will continue into Sunday．But as the working week （29）begins（begin） on Monday，it is on Tuesday （30）thatwe reach our （31）lowest（low），with levels of contentment（满足） dropping．
"（32）Itseems that on Monday the weekend has not quite worn off，"said Professor George MacKerron，who led the research．"By Tuesday people are well into the working week and the following weekend is not yet in sight．"

3．This essay is goodapart from a couple of spelling mistakes（除了有些拼写错误外）

2．Sheentertained（ 招待） each of children to an ice-cream．

1．The government will guidethe country through the difficulties ahead．

20．用日记形式记一次有意义的旅行．
提示：1．时间：2014年10月16日，星期天；2．天气：晴；3．人员：你班全体人员；4．地点：贺兰山森林公园（乘车一小时到达）；5．活动内容：记录看到的动植物，野餐，检验河水，看看是否有污染．
注意：词数100左右．