As we get older, the fear of not having a good memory grows for many people. A lot of people 48 that the loss of memory can be the sign of Alzheimer’s(老年痴呆症).
It is true that as we grow older we are more 49 to develop Alzheimer’s. But with a proper lifestyle that includes a balanced diet and exercise, one can stay mentally 50 into their old age.
There are many causes of memory loss that have nothing to do with Alzheimer’s. As researchers come 51 to understanding Alzheimer’s, the outlook(前景) is 52 for people with this illness. New treatments are becoming available. With improved diagnosis(诊断), medications and treatment, one day we may be able to 53 or even reverse (反转) memory loss as we age.
Memory loss is 54 a topic of concern for people. Having Alzheimer’s can lead to increased dependency on others. Not being able to manage basic daily 55 on your own or even not being able to recognize family members would be a serious hit to anyone. This is why many elderly people often have questions and concerns.
A．worry B．guess C．insist D．suggest
A．eager B．nervous C．likely D．ready
A．healthy B．honest C．brave D．kind
A．faster B．slower C．farther D．closer
A．reducing B．ending C．improving D．waiting
A．make B．take C．prevent D．protect
A．also B．still C．ever D．even
A．activities B．news C．meals D．drinks
The secret of staying slim could be as simple as keeping your mind on your meals. Research suggests that 1 ourselves from distractions and concentrating completely on the food that is in front of us, helps us stay in 2 . Such ‘mindful eating’ ensures that the 3 is in tune with (协调) the body, enabling it to ‘hear’ the chemical 4 that tell it that we are full。
Digestion 5 a complex series of signals between the gut (肠道)and the nervous system and it takes about 20 minutes for the brain to tell that the body has eaten enough. This means that if someone eats too 6 , the signals will come slowly, leading to 7 .
Scientists say that distractions make it 8 for us to remember what we have eaten. This absent-mindedness stops us from feeling 9 – and sends us reaching for some snacks later on. It is thought that our memory of what we have eaten plays a key role in 10 appetite. This means that distractions stop us from remembering the detail of what we have eaten – leaving us feeling 11 .
Advocates of mindful eating 12 chewing food slowly and taking note of its color, smell and flavor. Before 13 dieters should ask themselves if they are really hungry---and if not, distract themselves by going for a walk or reading. Done 14 , mindful eating may not only leave you 15 , but also make you enjoy mealtimes.
A．feeling B．protecting C．freeing D．saving
A．shape B．health C．touch D．business
A．appetite B．speed C．emotion D．mind
A．orders B．sounds C．desires D．messages
A．discovers B．involves C．sends D．holds
A．quickly B．slowly C．gradually D．suddenly
A．imbalance B．damage C．overeating D．failure
A．clearer B．easier C．sharper D．harder
A．full B．great C．comfortable D．delicious
A．building B．losing C．controlling D．improving
A．upset B．eager C．hungry D．desperate
A．mind B．advise C．avoid D．consider
A．snacking B．running C．writing D．cooking
A．quietly B．strongly C．properly D．poorly
A．slim B．fat C．strong D．calm
It is easy to overlook the role that your body plays in influencing your mood(情绪). When you are 49 , you may find yourself blaming work pressures or an unknown future. However, it could just be that you’ve been sitting behind your desk too long.
One way to improve your mood is 50 . Psychologically, it provides you with a break from the stresses in your life. Also, in the process, you may aim for 51 goals, like a new personal running record or a better body shape. The achievement of a particular goal makes you feel good and contributes to your 52 . That is why exercise has been shown to 53 your self-respect.
You do not have to train yourself 54 to feel the psychological benefits of exercise. What really matters is 55 , not intensity(强度) of your exercise. You can try walking for 30 minutes five times per week or simply gardening on weekends.
A．ill B．poor C．unhappy D． unsuccessful
A．play B．communication C．sleep D． exercise
A．clear B．present C．common D． early
A．ability B．relationship C．confidence D． business
A．tear down B．build up C．set aside D． give out
A．hard B．everywhere C．carefully D． late
A．time B．length C．form D． frequency
When it comes to eating smart for your heart, stop thinking about short-term solutions and simplify your life with a straightforward approach that will serve you well for years to come.
Smart eating goes beyond analyzing every bite of food you lift 36 your mouth. “In the past we used to believe that 37 amounts of individual nutrients were the 38 to good health,” Linda Van Horn, professor of the American Heart Association's Nutrition Committee. "But now we have a 39 understanding of healthy eating and the kinds of food necessary to 40 not only heart disease but disease 41 general," she adds.
Scientists now 42 on the broader picture of the balance of food eaten 43 several days or a week 44 than on the number of milligrams of this or that 45 at each meal.
Fruits, vegetables and whole grains, for example, provide nutrients and plant-based compounds 46 to good health. “The more we learn, the more 47 we are by the wealth of essential substances they 48 ," Van Horn continues, "and how they 49 with each other to keep us healthy."
You'll automatically be 50 the right heart-healthy track if vegetables, fruits and whole grains make 51 three quarters of the food on your dinner plate. 52 in the remaining one quarter with lean meat or chicken, fish or eggs.
The foods you choose to eat as well as those you choose to 53 clearly contribute to your well-being. Without a 54 , each of the small decisions you make in this can make a big 55 on your health in the years to come. A between B through C inside D to
A serious B splendid C specific D separate
A key B point C lead D center
A strict B different C typical D natural
A rescue B prevent C forbid D offend
A in B upon C for D by
A turn B put C focus D carry
A over B along C with D beyond
A other B better C rather D sooner
A conveyed B consumed C entered D exhausted
A vital B initial C valid D efficient
A disturbed B depressed C amazed D amused
A preserve B contain C attain D maintain
A interfere B interact C occupy D rest
A at B of C on D within
A out B into C off D up
A Engage B Fill C Involve D Pack
A delete B escape C avoid D spoil
A notion B hesitation C reason D doubt
A outcome B function C impact D commitment
Most young people 21 some form of 22 activity. It may be walking, cycling,or swimming, or in winter, skating, or skiing. It may be a game of some kind—football, hockey, golf or tennis. It may be mountaineering. (登山运动) Those who have a 23 for climbing high and difficult mountains are often 24 with astonishment. Why are men and women willing to 25 cold and hardship, and to take 26 on high mountains? This astonishment is caused, probably, by the 27 between mountaineering and other forms of activity 28 which men 29 their leisure (空闲的) time. Mountaineering is a sport and not a game. There are no manmade rules, 30 there are for such games as golf and football. There are, 31 rules of a different kind which would be dangerous to ignore, but it is this freedom from manmade rules 32 makes mountaineering 33 to many people. Those who climb mountains are 34 to use their own methods. If we compare mountaineering and other more familiar sports we might think that one big difference is that mountaineering is not a “team game” .We should be mistaken in this. There are , it is true, no “matches” between “teams” of climbers but when climbers are on a rock face 35 by a rope 36 which their lives may depend, there is obviously teamwork. The mountain climber knows that he may have to fight forces that are stronger and more powerful than man. He has to fight the forces of nature. His sport requires high mental and physical 37. A mountain climber continues to improve in skill year after year. A skier is probably past his best by the age of thirty, and most international tennis 38 are in their early twenties. 39 it is not unusual for men of fifty or sixty to climb the highest mountains in the Alps. They may take more time than younger men, but they probably climb with more skills and less waste of effort, and they certainly 40 equal enjoyment.
A．please B．play C．get D．enjoy
A．physical B．mental C．joy D．pleasant
A．feeling B．thirst C．possession D．position
A．looked down B．looked out C．looked upon D．looked round
A．suffer B．observe C．enjoy D．stare at
A．danger B．pains C．risks D．efforts
A．difference B．distance C．similarity D．relationship
A．into B．at C．for D．to
A．draw B．spend C．devote D．spare
A．as B．and C．or D．so
A．sometimes B．however C．of course D．therefore
A．which B．that C．what D．whatever
A．satisfying B．tiresome C．terrifying D．attractive
A．urged B．forced C．limited D．free
A．fixed B．hung C．linked D．winded
A．at B．in C．over D．on
A．efforts B．spirits C．techniques D．qualities
A．athletes B．observers C．champions D．sportsmen
A．But B．Therefore C．So D．Thus
A．experience B．give C．receive D．want
Overweight has been a great concern for some people. In an attempt to keep normal weight, people have 48 tried various methods. Nevertheless, not all the ways are 49 when it comes to health. For weight loss, many people 50 the high-protein, low-carbohydrate(碳水化合物)diets. However, such diets might have 51 harmful long-term effects on the colon (结肠), a small study indicates.
On average, the study found when the men were on the high-protein diets, they had higher levels of substances known as N-nitrous compounds that have been 52 cancer. And when they were on the high-protein, low-carbohydrate diet, they had lowered amounts of fiber-originated compounds thought to be protective against 53 .
The findings 54 that people should be aware of consuming too much protein and too little fiber over a long period. In general, experts 55 that adults get about 28 grams of fiber per day though—it’s not known whether that’s enough for someone on a high-protein weight-loss diet.
A．successfully B．painfully C．occasionally D．immediately
A．helpless B．cheap C．useless D．beneficial
A．make up B．come across C．turn to D．get on
A．potentially B．additionally C．frequently D．definitely
A．taken from B．linked to C．held up D．based on
A．health B．diet C．cancer D．protein
A．hope B．accept C．suggest D．doubt
A．recommend B．offer C．demand D．agree
Everyone needs water and a diet ______healthy foods. These foods should _____some fat, some fiber, a little salt and so on.
People need energy to live. They eat all kinds of foods_____change into energy. Our bodies use different _____of energy. The energy is measured in calories(卡路里).The more _____we take, the more calories we burn. Even when you are ____you are using energy ---about 65calories an hour. While you are at school, or walking home, your body is ____up 100 calories an hour. When playing football or basketball, you might be using 400 calories an hour. On ____Day, during the relay race, you will use most of all, perhaps as_____as 650 calories an hour.
The Chinese diet is considered to be the healthiest in the world. It contains a lot of fruit and green vegetables. It is _____in fiber and low in sugar and fat. The Chinese eat less sugar than many______countries in the world. That is _____lots of people in China have white teeth.
People in the western world do no eat _____healthy foods. They eat too much fat and sugar and don’t take _____exercise.Because of this, they ____weight very easily. In order to _____with the quick pace(步伐)of their life and work , they eat a lot of fast food . They eat a lot of sweets, soft drinks, potato crisp, chocolates, butter and ice cream and so on, _____are called ____food by some epicureans (美食家).The result is that many of them become fat. In order to avoid _____fat and _____it is advisable (明智的)to eat a balanced diet and not eat too many foods that have a high calorie rating.
A．above B．Of C．at D．over
A．include B．hold C．contain D．make up
A．which B．what C．Where D．it
A．numbers B．amounts C．plenty D．deal
A．exercise B．lesson C．sport D．games
A．waken B．running C．working D．asleep
A．running B．adding C．burning D．wasting
A．Children B．Work C．Sports D．Teacher
A．much B．many C．few D．little
A．poor B．low C．rich D．plenty
A．more B．other C．rest D．others
A．a number of B．too much C．masses of D．enough
A．lose weight B．put on C．die D．stay healthy
A．keep up B．carry on C．keep on D．go on
A．as B．these C．which D．they
A．bad B．disease C．healthy D．junk
A．to get B．becoming C．to become D．get
A．keep thin B．keep fit C．stay calm D．fall ill
完型填空（共20小题；每小题1．5分，满分30分）
Sports and 1 do a lot of good to our health. They can make us strong, 2 us from getting too fat, and keep 3 and fit. 4 they can be of great value to people 5 work with their brains most of the day, for sports and games give people 6 practice in exercising the body. 7 , they make our life richer and 8 colorful. If we 9 have a strong body, we will find it hard to do 10 we want. 11 persons of all ages enjoy watching and 12 various kinds of sports——track and fields, swimming, skating, 13 , volleyball and basketball, etc. Sports and games are also very useful in 14 training. They demand not only 15 skills and strength but also courage, endurance (忍耐力), discipline (纪律性) and usually teamwork. For boys and girls, what is learned in the playground often has a deep 16 on their character. 17 each of them learns to work for his team and not for himself on the football field, he will later find 18 natural to work for the good of his country 19 only for his own benefit. A healthy 20 makes a strong country. Let’s all take part in sports and games.
A．music B．art C．games D．entertainment
A．prevent B．protect C．admit D．contain
A．upset B．healthy C．foolish D．calm
A．Firstly B．Personally C．Specially D．Especially
A．where B．which C．that D．who
A．value B．valuable C．worth D．valueless
A．What’s more B．In general C．After all D．In time
A．less B．more C．most D．least
A．didn’t B．do C．don’t D．did
A．who B．whatever C．which D．whichever
A．And B．But C．Or D．So
A．carrying on B．taking part in C．joining D．adding up
A．football B．play C．video D．film
A．look B．character C．appearance D．expression
A．spiritual B．material C．mental D．physical
A．affect B．effect C．trouble D．doubt
A．when B．as if C．because D．if
A．them B．this C．it D．that
A．Apart from B．Instead C．Because of D．Instead of
A．student B．doctor C．citizen D．teacher
Keeping _36___and slim is the dream of many girls. Here is some advice about losing__37__. First, __38__attention to the amount of food you have every day. But it doesn’t mean you should starve(饿死) yourself. Your body _39___ nutrition(营养). The key is a healthy_40___. Have more vegetables, fruit, milk and eggs and try to stay away from fast food, especially fries. Experts have pointed _41___ that having too many fries can even cause_42___. The last thing you should remember is to__43_ consistently(持续地). One or two days of jogging will make__44_ improvement. What you have to do is to leave your sofa, TV set, and snacks behind and to _45__ into the open air!
A．fit B．clean C．quiet D．cool
A．height B．flight C．weight D．heart
A．take B．give C．put D．pay
A．have B．needs C．takes D．makes
A．snack B．drink C．food D．diet
A．out B．in C．on D．at
A．bad B．cancer(癌症) C．effect D．terrble
A．exercise B．run C．jump D．swim
A．some B．any C．not D．no
A．get up B．get out C．get down D．get off
We can’t live without food. Today our knowledge of food and what it does for our bodies is far more advanced than____1_____of the old times. Now we know____2___vitamins and how each kind of vitamins__3_____in the growth of a special part of our body._____4____ on the market all kinds of vitamins which we can take to______5____our lack of certain important things which are needed for good health.____6____ if we eat well and properly, the food that we eat will ___7____ our bodies and so there is no____8_____to take any kind of vitamins ____9____ our doctors tell us that our bodies are_____10____of something which can be supplied by it. Generally speaking, everything we eat ____11____ some good to our bodies, but if we eat ____12____ of one kind of food and pay______13____attention to others, we may have too much of one kind and not____14____ of others. Then we may be ____15___ trouble. We are often told___16_____ we must eat some meat every day in order to get the necessary proteins. That is only____17____true, for proteins are not found only in meat. We can also get them___18____some vegetables. The best advice about ____19___ to eat is that we should eat all kinds of food____20__ never too much of one kind.
A．it B．those C．that D．this
A．of B．about C．/ D．for
A．does B．makes C．helps D．works
A．There have B．There are C．They are D．They have
A．have for B．make for C．get for D．make up for
A．Of course B．Then C．But D．And
A．attend B．take care of C．look for D．pay attention to
A．worry B．possibility C．need D．chance
A．when B．if C．unless D．until
A．short B．lost C．part D．full
A．has B．is C．makes D．does
A．too much B．too little C．too few D．too many
A．too little B．too much C．a little too D．much too
A．a little B．little C．many D．enough
A．into B．at C．in D．out of
A．when B．that C．how D．where
A．likely B．partly C．hardly D．really
A．from B．for C．of D．into
A．what B．whether C．why D．which
A．even B．or C．and D．but
There are times when people are so tired that they fall asleep almost anywhere. We can see a lot of people sleeping on the bus or train on their way home ____ work in the evening. A man will be reading the newspaper, and seconds later it appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger sitting next to him. Another place where __
__ (plan) short sleep goes on is in the lecture hall __
__ a student will start snoring so loudly that the professor has to ask __
__ student to shake the sleeper awake. A more _
__ (embarrass) situation occurs when a student starts falling into sleep and __
__ weight of the head pushes the arm off the desk, and the movement carries the rest of the body along. The student wakes up on the floor with no memory of getting there. The __
_ (bad) time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go off the road. __
__ the drivers are lucky, they are not seriously hurt. One woman’s car, for example, went into the river. She woke up in four feet of water and thought that it __
__ (rain). When people are really tired, __
__ will stop them from falling asleep — no matter where they are.
Eating a diet high in processed food increases the risk of depression, research suggests. What's more, people who ate plenty of vegetables, fruit and fish actually had a lower risk of depression, the University College London team found.
Data on diet among 3,500 middle-aged civil servants were compared with their emotional state five years later, a British journal reported. They split the participants into two types of diet--those who ate a diet largely based on whole food，which includes lots of fruit, vegetables and fish，and those who ate a mainly processed food diet, such as sweetened desserts, fried food, processed meat，refined grains and high fat dairy products After accounting for factors such as gender, age, education, physical activity, smoking habits and chronic(慢性的) diseases, they found a significant difference in the future depression risk with the different diets.
Those who ate the most wholefood had a 26% lower risk of future depression than those who ate the least wholefood. By contrast, people with a diet high in processed food had a 58％ higher risk of depression than those who ate a diet low in processed foods.
Study author Dr. Archana Singh Manoux pointed out there was a chance that the finding could be explained by lifestyle factor they had not accounted for. He also pointed in a paper that a Mediterranean diet was associated with a lower risk of depression, but the problem with that is if you live in Britain, the likelihood of you eating a Mediterranean diet is not very high.
Dr．Andrew McCulloeh, chief executive of the Mental Health Foundation, said, this study adds to an existing body of solid research that shows the strong links between what we eat and our mental health.
He added people's diets were becoming increasingly unhealthy. The UK population is consuming less nutritious, fresh produce and more saturated fats and sugars.
The text is mainly about .
A．the increasingly unhealthy diet of the UK population B．the link between processed food and depression C．the relationship between physical and mental health D．the emotional state of the British People
A．They are of different ages from young to old. B．They are from different walks of life. C．They chose the diet they preferred. D．Their state are also affected by other factors.
A．It is difficult for most British people to have a Mediterranean diet. B．The Mediterranean diet is the most healthy in the world. C．Many studies have been done on the Mediterranean diet before. D．The Mediterranean diet is not good for depression.
A．our diets are closely related to our mental health B．the present study needs more facts and other information C．the UK population will become ill in the near future D．more saturated fats and sugars should be taken in
A．To tell people what a healthy diet actually is. B．To prove people’s diets are increasingly unhealthy. C．To encourage people to cut down on processed food. D．To introduce some experts on the research team.
My son was badly hurt in a fire．After he__36__from a series of treatments，the doctors told him they would not do any operation for six months__37__it took long for the skin to stop shrinking （收缩）. So, he had to return to college with a visible 10inch__38__on his face.
I said to my son, “Keaston，__39__will pay any more attention to your scar__40__you do. If it does not bother you, it will not bother__41__.” He took my advice to heart and returned to school with his head__42__high—glad he was alive.
__43__, everyone has scars and shortcomings．Some of you may spend much time thinking that people would like you better, __44__you looked different, or dressed differently, or could have a different and newer__45__.
But you see, like Keaston’s scar，people will only judge you by your looks，or your__46__, or your car, if you are judging yourself by these same false__47__.
One of my friends in college was very__48__. At first, when people met him, they noticed his__49__for about 10 seconds. This man felt__50__about himself and spent most of his time__51__about other people’s comfort and welfare.__52__, people ignored his looks. What people__53__was his kindness and his concern for them. He didn’t act in an ugly way so people didn’t treat him as an ugly man.
Therefore, concentrate on what you value__54__yourself, because if you can see that beautiful person, everyone you are in contact with will see the same__55__.
A．cured B．recovered C．improved D．returned
A．because B．though C．until D．before
A．cut B．wound C．injury D．scar
A．no one B．anyone C．everyone D．someone
A．as B．like C．than D．when
A．another B．others C．all D．us
A．put B．held C．taken D．hung
A．After all B．In conclusion C．In fact D．Above all
A．as long as B．if C．even if D．as if
A．house B．telephone C．job D．car
A．clothes B．hairstyle C．figure D．salary
A．means B．standards C．comments D．rules
A．smart B．optimistic C．rude D．ugly
A．manners B．expressions C．looks D．actions
A．lucky B．worried C．good D．sad
A．inquiring B．asking C．knowing D．caring
A．Completely B．Gradually C．Obviously D．Suddenly
A．wanted B．understood C．brought D．saw
A．within B．beyond C．except D．above
A．kindness B．concern C．beauty D．perfection
I believe ___36__ is a powerful(强效的) medicine.
It was Sunday. I had the last __37__ to see and I get into her room. She was an old woman, sitting on the bed, trying to ____38__ her socks. Usually I said something like this: “How are you feeling? The nurse says your _39__ is visiting you today. I believe you are __40__ him.
She ___41___ with a serious voice, “ Sit down, doctor. This is my story, not yours.” I was surprised and ___42___. I sat down and helped her with the ___43__. She began to tell me that her only son lived not far away from her, ___44___ she had not seen him for five years. She believed her ___45__ problems were worse because of ___46__ her son. After hearing her story and helping her put on her socks, I asked if there was ____47___ I could do for her. She __48__ her head and smiled. All she wanted me to do was to __49__.
Each story is ___50__. Some are clear; others are not. Some are true; others are not, yet all those things do not __51_. What matters to the storyteller is that the story is heard.
Listening to someone’s story costs ___52___ but it is the key to healing(康复). I often ____53__ what the woman taught me, and I ____54__ myself of the importance of stopping, sitting down and truly listening. I __55___ the power of listening.
A．speaking B．reading C．listening D．writing
A．doctor B．nurse C．patient D．student
A．take off B．get off C．clean out D．put on
A．daughter B．son C．sister D．brother
A．looking forward to B．asking for C．going on D．worrying about
A．impressed B．stopped C．asked D．greeted
A．excited B．mad C．embarrassed D．angry
A．shoes B．shirt C．socks D．shorts
A．or B．so C．but D．if
A．health B．mental C．physical D．aging
A．missing B．loving C．understanding D．meeting
A．nothing else B．anything C．nothing D．everything
A．shook B．dropped C．waved D．moved
A．see B．write C．listen D．feel
A．terrible B．different C．similar D．true
A．happen B．appear C．matter D．change
A．anything B．everything C．something D．nothing
A．think of B．dream of C．get over D．laugh at
A．teach B．ask C．remind D．cheer
A．talk about B．show off C．believe in D．run out of
I fell in love with Yosemite National Park the first time I saw it, when I was 13. My parents took us there for camping. On the way out, I asked them to wait while I ran up to E1 Capitan, a 16 rock of 3,300 feet straight up. I touched that giant rock and knew 17 I wanted to climb it. That has been my life’s passion (钟爱) ever since 18 the rocks and mountains of Yosemite. I’ve long made Yosemite my 19 .
About 15 years ago I started seeing a lot of 20 , like toilet paper, beer cans, and empty boxes, around the area. It’s 21 me why visitors started respecting the place 22 and treated such a beautiful home-like place this way.
I tried 23 trash(垃圾)myself, but the job was too big. I would 24 an hour or two on the job, only to find the area trashed all over again weeks later. Finally, I got so 25 it that I decided something had to change.
As a rock-climbing guide, I knew 26 about organizing any big event. But in 2004, together with some climbers, I set a date for a 27 . On that day, more than 300 people 28 . Over three days we collected about 6,000 pounds of trash. It was amazing how much we were able to 29 . I couldn’t believe the 30 we made—the park looked clean!
Each year volunteers come for the cleanup from everywhere. In 2007 alone, 2,945 people 31 42,330 pounds of trash.
I often hear people 32 about their surroundings. If you are one of them, I would say the only way to change things is by 33 rather than complaining. We need to teach by 34 . You can’t blame others 35 you start with yourself.
A．distant B．huge C．narrow D．loose
A．immediately B．finally C．gradually D．recently
A．imagining B．painting C．describing D．climbing
A．garden B．home C．lab D．palace
A．source B．resources C．waste D．goods
A．beyond B．against C．over D．within
A．more B．most C．less D．least
A．throwing away B．picking up C．breaking down D．digging out
A．kill B．save C．wait D．spend
A．satisfied with B．delighted in C．tired of D．used to
A．something B．anything C．everything D．nothing
A．cleanup B．party C．picnic D．concert
A．dropped out B．showed up C．looked around D．called back
A．demand B．receive C．accomplish D．overcome
A．plan B．visit C．contact D．difference
A．picked up B．set up C．handed D．set down
A．talk B．complain C．argue D．quarrel
A．doing B．thinking C．questioning D．watching
A．method B．explanation C．example D．research
A．although B．if C．when D．unless
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