Monitoring global warming usually requires a Ph. D. and enough maths to glaze your eyes. But that Francisco Lopez and Ruby Nostrant track（記錄）what climate change is doing to five different plants in Tucson, Arizona and they are only in the second grade.
“We are collecting data because the weather is changing and the plants are blooming,” Ruby explained.
Scores of other students at Borton Primary Magnet School and Sunnyside High School in Tucson are heading outdoors to be part of a new scientific push to figure out how the biological timing of the earth is changing. It’s a research project that the average person, even a kindergartner, can join in.
The National Phenology（生物氣候?qū)W）Network is calling on volunteers to help track early spring blooms and eventually changes in animals caused by global warming. It’s called Project Budburst. When it was first open to the public last year, thousands of people participated in 26 states.
“All people can contribute to it by tracking the timing of flowering events or leaf-out events for plants and animals in their backyard,” said Phenology Network director Jake Weltzin. He calls the volunteers “citizen-scientists.”
The idea is that tracking flowers blooming—especially lilacs（丁香）; which everyday people have helped track for decades—is fairly simple. The Website http://www.Windows.ucar.edu/ citizen_science/budburst/index.html gives directions on what to look for in different parts of the country.
University of Maryland professor David Inouye said it’s so easy to figure out what’s blooming that a lack of special knowledge isn’t a problem.
University of Arizona ecology graduate student Lisa Benton coordinated（協(xié)調(diào)）the Tucson high school students as they looked at plants five minutes from their high school. Each student has specific guidelines and she’s been happy so far with the data she is getting. For his part, second-grader Francisco said he had fun helping out.
“I like going out in the desert,” he said. “I want to be an Einstein.”
小題1:Francisco Lopez and Ruby Nostrant are monitoring global warming by __________.

A．watching early spring blooms and changes in animals

B．studying the biological timing of earth

C．collecting data of the local weather

D．tracking the early spring blooms of some local plants

小題2:Those who participate in Project Budburst are mostly ___________.

A．ecology college graduates	B．high school students
C．common people	D．experts

小題3:What David Inouye says suggests that ____________.

A．the study carried out by students is convincing

B．the students still need special training to study climate change

C．it is difficult to study climate change

D．to figure out what’s blooming needs special knowledge

小題4:Who is primary school student joining in the Project Budburst?

A．Lisa Benton.	B．David Inouye
C．Francisco Lopez.	D．Jake Weltzin.

小題5:We can conclude from the passage that _______.

A．changes in animals caused by global warming happen earlier than those in plants

B．the biological timing of earth is changing because of climate change

C．the effect of climate change in Tucson, Arizona can be hardly noticed

D．a(chǎn)ll the plants in Tucson, Arizona are blooming earlier because of climate change

When you travel in South America, you’d better pay attention to the following three kinds of dangerous South American animals.
Piranhas（水虎魚）
Although only a small number of piranhas are considered to be dangerous to humans, the red-bellied piranha is definitely one of those. Evidence has shown that a large group of piranhas can absolutely eat a herd of large animals crossing the river, leaving only bones. This fish lives in the freshwater streams of South America, and they can smell the blood from far away and launch attacks swiftly. It is said that they are only dangerous to humans if the water volumes are less and lower.
Anacondas（水蟒）
This South American monster of a creature often appears in the films or your nightmares！They have weighed over 230 kilograms. It is often considered to be the biggest snake in the world. You certainly don’t want to get caught alone with this snake due to its method of attacking and killing its victim. It is indeed a remarkably different brand of snake type as it regularly coils（纏繞）around all over its target, increasing the pressure until eventually its victim dies. Its jaws are powered by large muscles that produce enough power for its over 100 sharp teeth to pass through the thick skin of an crocodile. They don’t have poison. Sometimes they prefer to camouflage themselves so they look like their surroundings and swiftly draw back when humans are near.
Golden Poisonous Frogs
The golden poison frog might be the most-deadly of the South American animal, which is protected by means of poison. This very small frog, less than 55 mm in length, packs enough punch（效力）to take down a pair of African bull elephants. This apparently harmless frog has always been known to have killed people who have touched it directly. It’s also been noted that chicken and dogs have died by contacting things on which a golden poison frog had wandered! In intense colors, they normally look attractive to their targets.
小題1:What can we learn about piranhas from the passage?

A．Piranhas are the most dangerous animals.

B．Piranhas like to live in the deep seabed.

C．Piranhas may attack human beings when the water level is low.

D．Piranhas only attack human beings when they cross the river in groups.

小題2:How does an anaconda kill its victim according to the passage?

A．It often uses its poison to kill its victim.

B．It often uses its strength to kill its victim.

C．It kills its victim mainly using its powerful teeth.

D．It kills its victim with the help of other snakes.

小題3:The underlined word “camouflage” in Paragraph 3 means “________”.

A．hide itself by appearing like the surroundings

B．terrify and capture the enemy by making much noise

C．move around to search for delicious food

D．give off harmful gas to kill the targets

小題4:Chicken and dogs are mentioned in Paragraph 4 to show that ________.

A．no animals can survive the poison of the golden poison frog

B．they like to wander along the path of the golden poison frog

C．the golden poison frog likes eating them most

D．the poison of the golden poison frog is deadly

Frogs are animals that can live both in water and on land. There are more than 5,000 kinds of frogs on the earth. The earliest known frogs lived about 190 million years ago and the frogs today still look the same. Here are some fun things that you might not know about frogs. Enjoy!
The Biggest and the Smallest Frogs
Some frogs can be very big. The biggest kind of frog is the Goliath Frog in West Africa. Its body can be nearly 30cm long, about the size of a large cat. The Gold Frog and the Poison Frog are the smallest frogs in the world. They are less than 1cm long. Though the Poison Frog is very small, it is not weak at all. It is dangerous. Any animal that eats it will die very soon.
The Best Jumpers
Frogs are very good at jumping. They developed jumping legs so that they would not be eaten by other large animals. Using their big strong legs, more frogs can jump over 20 times their own length. It is like a person jumping over about 30,48. The Australian Rocket Frog can even jump over 2m, which is 50 times its body length(5.5cm). That might be the reason why frogs are called the best jumpers on the earth.
The Cryogenic Animal
Some frogs like the Common Wood Frog have a special ability to live in very cold places. When the temperature goes down, they become ice frogs. 2/3of their body water freezes. Their hearts stop, and their breathing stops too. You may think they are dead, but in fact they are not. Maybe we humans can learn the way that the frogs do for medical purpose.
小題1:The earliest frogs lived about ________ million years ago.

A．20

B．30

C．50

D．190

小題2:The Gold Frog is one of the ________ frogs on the earth.

A．smallest

B．biggest

C．strongest

D．weakest

小題3:________ can jump over 2m.

A．The Goliath Frog	B．The Common Wood Frog
C．The Poison Frog	D．The Australian Rocket Frog

小題4:What will happen to a Common Wood Frog at very low temperature?
A.It will die very soon.   B. It will be an ice frog.
B.It will become dangerous.   D. It will become very small

Riding a London subway, a person from other countries will notice one major difference: in London, people do not look at each other．In fact, eye contact is avoided at all times. That’s not rudeness ― people are just too busy to bother looking．
　　Busy doing what, you ask? Well, they’re certainly not using the time for a moment of quiet thinking．Nor are they reading a book．New technology has replaced quiet habits．Today the only acceptable form of book on the London underground is an e-book．
　　Apple must earn a fortune from London commuters（使用月票上下班者）. Since the launch of the iPhone in 2007, over 40, 000 ― yes, 40, 000 “apps” have been designed．
　　Commuters love them because they are the perfect time - fillers. One “app”, called iShoot, is a game that features tanks．Another one, Tube Exits, tells passengers where to sit on the train to be closest to the exit of their destination. iSteam clouds the iPhone screen when you breathe into the microphone. You can then write in the “steam” on your phone screen．
　　For those without an iPhone, another Apple product, the iPod, may be the distraction (消遣) of choice. It’s not just teenagers who “plug in” to their music － iPods are a popular way to pass the time for all ages．
　　And if games, e-books and music aren’t enough to keep you occupied, then perhaps you would prefer a film? The development of palm DVD technology means many commuters watch their favorite TV shows or films on the way to work．With all these distractions, it’s amazing that people still remember to get off the train．
小題1:Those who want to save time to reach where they go can download ________ to their iPhones

A．iShoot

B．Tube Exits

C．iSteam

D．iPod

小題2:People in London do not make eye contact on the subway because ________．

A．they are going to work and have no time to communicate with each other

B．they love reading books and do not want to be disturbed

C．they feel sleepy because of getting up early

D．they’re busy playing games, reading e-books, listening to music or watching films

小題3:The underlined word “apps” in the third paragraph means ________．

A．computers

B．programs downloaded for the iPhone

C．computer companies

D．fortune from London commuters

小題4:The main idea of the passage is that ________．

A．London commuters are unfriendly to strangers

B．Apple has earned a lot of money from selling 40, 000 apps

C．technology is changing how London commuters spend their traveling time

D．riding a London subway is a must when visiting London

Everybody cheats. Whether it’s the taxi driver who tricks a visitor and takes them the long way round, or the shop assistant who doesn’t give the correct change, or the police officer who accepts a bribe (賄賂) – everybody’s at it. Cheats in the nest include the scientist whose research was based on fake data, the game show competitors who worked with a friend in the audience or win a million pounds, and the doctor who made up his qualifications and wasn’t really a doctor at all. Everybody cheats; nobody’s playing the game.
Is cheating acceptable, a natural way of surviving and being successful? Or is it something that should be frowned on, and young people discouraged from doing? If it’s the latter how can we explain to children why so many bend the rules?
Take sport for example. The Word Cup was filled with cheating. Whether diving, pretending to be hurt or denying a handball, footballers will do anything for a free – kick or a penalty shot. France striker Henry denied cheating to win the free – kick which led to his side’s second goal in their 3 – 1 victory over Spain. Many footballers, however, are often putting it on. Whatever the nationality there’s one common ploy: the player rolls over holding their leg, ankle or head seeming to be in great pain. As a result a yellow card and / or free – kick is given for the foul and then, a few seconds later, the player is up and about as if nothing had happened ! The ref (裁判) may be taken in by it but youngsters watching the game aren’t. they also see their heroes getting away with it.
Of course it’s not just football. In 1998 the Tour de France, the world’s greatest cycling event, was hit by a drug – taking scandal (丑聞). The 40 bottles of forbidden drugs found with the Fustian team caused a massive investigation that almost caused the Tour to be abandoned. One rider, Veronique, was banned for 9 months. He claimed: “You have cheats in sport, just as you do in business – there will always be people trying to take a short cut. At least we’re not turning a blind eye to the problem, which other sports are.”
Is it all unavoidable? There’s huge pressure on all athletes to perform for their fans and for their sponsors. It’s success, money and power that rule professional sport rather than an honest at tempt to do the best one can.
Meanwhile companies around the world are losing billions of dollars to fake products. From cut price CDs and DVDs to sportswear, cheap fake products are everywhere. It has become socially acceptable to buy fake Gucci bags and illegal copies of films. If parents are doing this, their children will follow.
So perhaps it’s not surprising that around the world more pupils than ever are caught cheating during exams. In one case missing exam papers were put up for sale on the Internet. In another, widespread cheating took place by pupils using their mobile phones to receive tested answers. They blame the pressure put on them to do well in exams. It doesn’t help that their role models are also cheats. Surely we can’t complain when we’re setting such a bad example.
小題1:According to the passage, in which way can a game show player cheat?

A．By taking an indirect way.	B．By gaining aid from a friend.
C．By taking forbidden drugs.	D．By selling fake products.

小題2:The phrase “be frowned on”(Paragraph 2) most probably means           .

A．to be disapproved of	B．to be pushed forward
C．to be taken the place of	D．to be stuck with

小題3:The writer’s suppose for writing this passage is to         .

A．explain why people in almost every field cheat

B．complain about cheats in school education

C．persuade young people not to cheat in exams

D．blame the society for tolerating cheats

小題4:The writer mentions the example of the World Cup in Paragraph 3 in order to           .

A．show cheating is a common phenomenon nowadays

B．discuss the relationship between sport and cheating

C．explore the nature of cheating in important events

D．warn coaches and athletes of the danger of cheating

小題5:Which of the following is the main idea of the passage?

A．Exams are not a good way of testing children.

B．Children are natural cheats.

C．If adults cheat, children will cheat too.

D．Everyone including children cheats.

The bedroom door opened and a light went on, signaling an end to nap time．The toddle（初學(xué)走路的嬰兒）, sleepy-eyed, clambered to a swinging stand in his crib．He smiled, reached out to his father, and uttered what is fast becoming the cry of his generation: "iPhone!"
Just as adults have a hard time putting down their iPhones, so the device is now the Toy of Choice for many 1-, 2- and 3-year-olds．The phenomenon is attracting the attention and concern of some childhood development specialists．
Natasha Sykes, a mother of two in Atlanta, remembers the first time her daughter, Kelsey, now 3 but then barely 2 years old, held her husband's iPhone．"She pressed the button and it lit up．I just remember her eyes．It was like 'Whoa!' "The parents were charmed by their daughter's fascination．But then, said Ms．Sykes （herself a Black Berry user）, "She got serious about the phone．" Kelsey would ask for it．Then she'd cry for it．"It was like she'd always want the phone," Ms．Sykes said．
Apple, the iPhone's designer and manufacturer, has built its success on machines so user-friendly that even technologically blinded adults can figure out how to work them, so it makes sense that sophisticated children would follow．Tap a picture on the screen and something happens．What could be more fun?
The sleepy-eyed toddler who called for the iPhone is one of hundreds of iPhone-loving toddlers whose parents are often proud of their offspring's ability to slide fat fingers across the gadget's screen and pull up photographs of their choice．
Many iPhone apps on the market are aimed directly at preschoolers, many of them labeled "educational," such as Toddler Teasers: Shapes, which asks the child to tap a circle or square or triangle; and Pocket Zoo, which streams live video of animals at zoos around the world．
Along with fears about dropping and damage, however, many parents sharing iPhones with their young ones feel guilty．They wonder whether it is indeed an educational tool, or a passive amusement like television．The American Academy of Pediatrics is continually reassessing its guidelines to address new forms of "screen time．" Dr．Gwenn Schurgin O'Keeffe, a member of the academy's council, said, "We always try to throw in the latest technology, but the cellphone industry is becoming so complex that we always come back to the table and wonder- Should we have a specific guideline for them?"
Tovah P. Klein, the director of a research center for Toddler Development worries that fixation on the iPhone screen every time a child is out with parents will limit the child's ability to experience the wider world.
As with TV in earlier generations, the world is increasingly divided into those parents who do allow iPhone use and those who don't. A recent post on UrbanBaby.com, asked if anyone had found that their child was more interested in playing with their iPhone than with real toys. The Don't mothers said on the Website: "We don't let our toddler touch our iPhones ... it takes away from creative play." "Please ... just say no. It is not too hard to distract a toddler with, say ... a book."
Kathy Hirsh-Pasek, a psychology professor who specializes in early language development, sides with the Don'ts. Research shows that children learn best through activities that help them adapt to the particular situation at hand and interacting with a screen doesn't qualify, she said.
Still, Dr. Hirsh-Pasek, struck on a recent visit to New York City by how many parents were handing over their iPhones to their little children in the subway, said she understands the impulse (沖動(dòng)). "This is a magical phone," she said. "I must admit I'm addicted to this phone."
小題1:The first paragraph in the passage intends to ______.

A．get us to know a cute sleepy-eyed child in a family

B．show us how harmful the iPhone is

C．lead us to the topic of the toddlers' iPhone-addict

D．explain how iPhone appeals to toddlers

小題2:According to the author, iPhones are popular with both adults and young kids because they are______.

A．easy to use	B．beautiful in appearance
C．cheap in price	D．powerful in battery volume

小題3:The underlined word "them" in the seventh paragraph refers to ______.

A．televisions

B．cellphones

C．iPhones

D．screens

小題4:The tone of the author towards parents sharing iPhones with their children is ______.

A．negative

B．subjective

C．objective

D．supportive

小題5:The passage mainly tells us ______.

A．children's iPhone addict is becoming a concern

B．iPhone is winning the hearts of the toddlers

C．Apple is developing more user-friendly products

D．ways to avoid children's being addicted to iPhone games

A research found that people shown silent videos of piano competitions could pick out the winners more often than those who could also hear the music. It underlines the importance of our sense of vision, say scientists. Their study concludes that the best predictor of a winner’s musical performance was the visible passion they displayed, followed closely by their uniqueness and creativity.
Chia-Jung Tsay, from University College London, UK, is the study’s author and herself a concert pianist. She was interested in how music was judged and found that even professional musicians were unaware of how much they were using visual information over sound. “For the last two decades, I’ve taken part in various competitions. Through this experience, I found that depending on what type of evaluations were used, the results might vary widely. This led me to wonder about how much visual information really affects these important decisions,” she explained.
More than 1,000 participants in the study were given samples of either audio, silent video or video with sound, and asked to rate the top three finalists from 10 international classical music competitions. The actual competition winners were only correctly identified by those who were randomly assigned(分配) the silent videos.
Dr Tasy said the findings were quite surprising, especially because both trained musicians and those without training had stated that sound was most important for their evaluation. “Regardless of levels of expertise, we still seem to be led primarily by visual information, even in this field of music,” she said. “Classical music training is often focused on improving the quality of the sound, but this research is about getting to the bottom of what is really being evaluated at the highest levels of competitive performance. She added, “We must be more mindful of our inclination(傾向) to depend on visual information at the expense of the content that we actually value as more relevant to our decisions.”
小題1:According to the study, who would most probably win a piano competition? 

A．One who plays with great passion.

B．One who plays unique music.

C．One who plays creatively.

D．One who has a sense of vision.

小題2:The participates in the study were asked to__________.

A．watch classical music competitions

B．a(chǎn)ssign the silent videos

C．pick out the best three competitors

D．decide who the winner is

小題3:What probably led Dr Tsay to carry out the study?

A．Her love for music.

B．Her desire to explore.

C．Her experience as a competitor.

D．Her curiosity in musical education.

小題4:Where does this text probably come from?

A．A text book.	B．A sports magazine.
C．A story book.	D．A science website.

從題中所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
People often fall ill because of me. 36 , they can hardly blame me; it is largely their own 37  . A tired person may get 38  , especially when he goes to crowded places with polluted air. A sudden change in 39  is another factor. In hot summer, people turn on the air-conditioner upon returning home. They will catch a cold easily.
My latest victim is an energetic student. After school, he played football hard for two hours. Though 40 , he still went to the cinema .Then he got back home and took a cold shower immediately.
I seized this golden chance to 41  him .He reacted, trying to 42  me , but I was already 43  deep in his throat. He kept sneezing（打噴嚏） and his nose was running. 44  he put on some warm clothes, it didn’t work, for there were too many of us. Besides, his sore throat kept 45  him, and he developed a cough to force me and my family out, but   46  .
The next day he couldn’t go to 47 . He had lost his appetite and was not as 48  as before. His mother made him orange juice every few hours for more vitamin C, which would help his 49
For two days he was   50  by his mother. As he rested more, his defense strengthened and I began to feel the   51 . I knew I had to   52  him before long. But I am not the one who gives up easily, and I made every effort to fight back. 53 , it was my turn to feel   54 now, for his defense system was starting an all-out attack against me. I became  55  and finally my time was over.
Do you know what I am?

小題1:	A．Therefore B．Besides C．However D．Then

小題2:	A．business B．responsibility C．excuse D．fault

小題3:	A．punished B．blamed C．caught D．killed

小題4:	A．temperature B．season C．place D．condition

小題5:	A．excited B．hurt C．late D．tired

小題6:	A．injure B．bother C．a(chǎn)ttack D．destroy

小題7:	A．get on with B．get rid of C．put up with D．take hold of

小題8:	A．reproducing B．waiting C．hiding D．disappearing

小題9:	A．Since B．Once C．Whether D．Although

小題10:

A．reminding B．upsetting C．comforting D．Influencing

小題11:

A．escaped B．succeeded C．regretted D．failed

小題12:

A．bed B．work C．school D．hospital

小題13:

A．peaceful B．a(chǎn)fraid C．a(chǎn)ctive D．happy

小題14:

A．recovery B．development C．study D．a(chǎn)ffected

小題15:

A．protected B．nursed C．scolded D．a(chǎn)ffected

小題16:

A．loss B．operation C．pressure D．movement

小題17:

A．leave B．catch C．forget D．beat

小題18:

A．Uncertainly B．Unfairly C．Unusually D．Unfortunately

小題19:

A．painful B．tired C．nervous D．a(chǎn)shamed

小題20:

A．bigger B．weaker C．smaller D．stronger

The computer keyboard helped kill shorthand---a system of rapid handwriting, and now it's threatening to finish off handwriting as a whole. When handwritten essays were introduced on the SAT exams for the class of 2011, just 15% of the most 1.5 million students wrote their answers in cursive (草寫字母）.The rest? Block letters.
And those college hopefuls are just the first edge of a wave of US students who no longer get much handwriting instructions in the primary grades, frequently 10 minutes a day or less. As a result, more and more students struggle to read and write cursive.
At Keene Mill Elementary School in Springfield, all their poems and stories are typed. Children in Fairfax County schools are taught keyboarding beginning in kindergarten. Older students who never mastered handwriting say it doesn't affect their grades.
There are those who say the culture is at a crossing, turning from the written word to the typed one. If handwriting becomes a lost form of communication, does it matter?
It was at University of Virginia that researchers recently discovered a previously unknown poem by Robert, written in his unique script. Handwritten documents are more valuable to researchers, historians say, because their authenticity (真實(shí)性）can be confirmed. Students also find them more fascinating.
The loss of handwriting also may be a cognitive (認(rèn)知的）opportunity missed. Several academic studies have found that good handwriting skills at a young age can help children express their thoughts better-a lifelong benefit.
It doesn't take much to teach better handwriting skills. At some schools in Prince George's County, elementary school students use a program called Handwriting Without Tears for 15 minutes a day. They learn the correct formation of manuscript letters through second grade, and cursive letters in third grade.
There are always going to be some kids who struggle with handwriting because of their particular neurological (神經(jīng)系統(tǒng)的)wiring, learning issues or poor motor skills. Educators often point to this factor in support of keyboarding.
小題1:What is the author concerned about after 2011 SAT exams?

A．Keyboarding.	B．Shorthand
C．Handwriting.	D．Block letters.

小題2:A poem by Robert mentioned in the passage is used to _________.

A．prove how valuable handwriting is

B．explain what a famous poet he is

C．show how unique his poem is

D．stress how fascinating the documents are

小題3:The example of Handwriting Without Tears helps to argue that_________.

A．the schools are responsible for the loss of handwriting

B．the loss of handwriting is a cognitive opportunity missed

C．it doesn't take much to teach better handwriting skills

D．the culture is turning from the written word to the typed one

小題4: According to the author, when is a perfect time to learn handwriting?

A．Kindergarten.

B．Primary school.

C．High school.

D．College.

小題5:What is the author’s attitude towards this debate?

A．Devotion.

B．Encouragement.

C．critical.

D．Objective.

Educating girls quite possibly gets a higher rate of return than any other deal available in the developing world．Women's education may be unusual field for economists, but increasing women's contribution to development is actually as much an economic as a social project．And economics, with its emphasis on incentives （激勵(lì)）, provides an explanation for why so many girls lose the chance of education．
Parents in low-income countries don't send their daughters to school because they do not expect them to make an economic contribution to the family: girls grow up only to marry into somebody else's family and bear children．Girls are thus seen as less valuable than boys and are kept at home to do housework while their brothers are sent to school----the prophecy （預(yù)言） becomes self-fulfilling, trapping women in a vicious circle （惡性循環(huán)）of abandonment．
An educated mother, on the other hand．has greater earning abilities outside the home and faces an entirely different set of choices．She is likely to have fewer but healthier children and can insist on the development of all her children, ensuring that her daughters are given a fair chance．The education of her daughters then makes it much more likely that the next generation of girls, as well as of boys．will be educated and healthy. The vicious circle is thus transformed into a virtuous circle （良性循環(huán)）．
Few will argue that educating women has great social benefits．But it has enormous economic advantages as well．Most obviously, there is the direct effect of education on the wages of female workers．Wages rise by 10 to 20 per cent for each additional year of schooling．Such big returns are impressive by the standard of other available deal, but they are just the beginning．Educating women also has a significant impact on health practices， including family planning．
小題1:The author argues that educating girls in developing countries is _______．

A．expensive	B．troublesome
C．rewarding	D．labor-saving

小題2:What does the author say about women's education?

A．It has developed the interest of a growing number of economists

B．It is in the first place in many developing countries

C．It deserves greater attention than other social project

D．It will get greater returns than other known deal

小題3:The passage mainly discusses ______．

A．unequal treatment of boys and girls in developing countries

B．the economic and social benefits of educating women

C．the major contributions of educated women to society

D．the potential earning power of well-educated women