Each sentence has a mistake. Find it bychosing A B C or D

Mollusks, recognizing by most people by their shells, create some of the most diverse and beautiful objects on Earth

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But for our parents, we ………………… successful in life.

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Climate change is caused by the (1) ______ high levels of dangerous chemicals in the  atmosphere, particularly carbon dioxide. It is estimated that average global temperatures will rise (2) _______ between two and six degrees by the end of this century. We all know the effects could be catastrophic, but are we (3) _______ of the possible solutions? Crazy as it sounds, a group of academics from British universities is making a plan to build a 12-mile pipe, held up by a huge balloon, that would pump (4) ____ quantities of toxic chemicals, such as sulphur dioxide, into the atmosphere. Surprisingly, there is good science behind the idea. The chemicals would form a (5) ____ layer around the Earth that would reflect sunlight and so cool the Earth, much like the effects of a volcanic eruption

It used to be that people would drink coffee or tea in the morning to pick them up and get them going for the day. Then cola drinks hit the market. With lots of caffeine and sugar, these beverages soon became the pick-me-up of choice for many adults and teenagers. Now drink companies are putting out so-called "energy drinks." These beverages have the specific aim of giving tired consumers more energy.

One example of a popular energy drink is Red Bull. The company that puts out this beverage has stated in interviews that Red Bull is not a thirst quencher. Nor is it meant to be a fluid replacement drink for athletes. Instead, the beverage is meant to revitalize a tired consumer's body and mind. In order to do this, the makers of Red Bull, and other energy drinks, typically add vitamins and certain chemicals to their beverages. The added chemicals are like chemicals that the body naturally produces for energy. The vitamins, chemicals, caffeine, and sugar found in these beverages all seem like a sure bet to give a person energy.

Health professionals are not so sure, though. For one thing, there is not enough evidence to show that all of the vitamins added to energy drinks actually raise a person's energy level. Another problem is that there are so many things in the beverages. Nobody knows for sure how all of the ingredients in energy drinks work together.

Dr. Brent Bauer, one of the directors at the Mayo Clinic in the US, cautions people about believing all the claims energy drinks make. He says, —It is plausible if you put all these things together, you will get a good result. || However, Dr. Bauer adds the mix of ingredients could also have a negative impact on the body. —We just don't know at this point,|| he says.

(Source: —Reading Challenge 2||, Casey Malarcher & Andrea Janzen, Compass Publishing)

What is the main idea of this passage?

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According to the report, we can expect some pretty remarkable changes to our homes  and our personal spaces, overlooked things that make up so much of our daily routine. As human populations soar, our cities and homes will have to adapt; interior living spaces will change as a cloud changes, easily reconfigured and rearranged to suit our fickle tastes, or accommodate different purposes.  Imagine walls and floors made of a malleable “skin,” and embedded with tiny sensors and actuators so that the shape and size of living spaces can quickly change, or even be divided into smaller rooms; imagine fully programmable “smart homes” that can be controlled remotely, and provide feedback to their owners - yes, there’ll even be an app for that.  Virtual decorations will alter with changing tastes, moods and whims; and the entire interior surface of the home will be implanted with LED technology - television screens and computer displays will form and unform in any room, as needed. Even our furniture will be adaptable, molding to custom fit our bodies, responding to changes in posture, or disappearing altogether when not needed.  It will be the ultimate evolution of the “Internet of Things.” Misplaced something? Can’t find your keys? No problem. Just use an online search function to find it. Hate the color of that accent wall? Delete it. Need more storage space? Watch new shelves appear, as if by magic. And the amenities are fantastic. Every home will come standard with a 3D printer; they’ll be able to churn out just about anything you could wish, using downloadable patterns, probably including even complex electronic devices. They may even print out your meals, designed and programmed by the world’s master chefs.  Walk-in “medical pods,” meanwhile, will contribute to the decentralization of healthcare - their imaging sensors will diagnose your ills and, for the more easily treatable maladies, dispense drugs, inject antibiotics, and recommend health regimens. It may even be possible to undergo remote, robot-mediated surgery, in the comfort of your own home.  This barely scratches the surface. Imagine homes whose very building material is salted with dormant limestone-producing bacteria, which awaken upon contact with moisture and repair any cracks or structural damage.  There will be “digestion tanks” full of anaerobic bacteria, to dispose of our waste; and our homes will produce, store, and reuse their own energy, using “microbial fuel cell stacks” and more efficient solar panels to generate electricity, and power-banks like the Tesla power wall to store it against future use. Personal homes will be almost fully independent of a dangerously overtaxed energy grid.  One hundred years in the future, our houses will be, in almost all respects, semiliving, artificial organisms - closed systems with a metabolism, sensory apparatus, immune response, and an approximation to a nervous system. We’ll be living in homes that are practically alive.
6. The word "They" in paragraph 5 refers to ______

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One of the highest honors for formalists, writers, and musical composers is the PulitzerPrize. First awarded in 1927, the Pulitzer Prize has been won by Ernest Hemingway, Harper Lee,John F. Kennedy, and Rodgers and Hammerstein, among others. As with many famous awards,this prize was named after its founder, Joseph Pulitzer.
Joseph Pulitzer’s story, like that of many immigrants to the United States, is one ofhardship, hard work and triumph. Born in Hungary, Joseph Pulitzer moved to United States in1864. He wanted to be a reporter, but he started his American life by fighting in the AmericanCivil War. After the war, Pulitzer worked for the German - language newspaper, the WestlichePost. His skills as a reporter were wonderful, and he soon became a partial owner of the paper.
In 1978, Pulitzer was able to start a newspaper of his own. Right from the first edition,the newspaper took a controversial approach to new. Pulitzer wanted to appeal to the averagereader, so he  produced  exciting  stories  of  scandal  and  intrigue.  Such  an  approach   iscommonplace today, but in Pulitzer’s time it was new and different. The approach led to thediscovery of many instances of corruption by influential people. Pulitzer ‘paper became veryfamous and is still produced today.
The success of Joseph Pulitzer’s newspaper made him a very wealthy man, so he wantedto give something back to his profession. Throughout his later years, he worked to establishuniversity programs for the teaching of journalism, and he funded numerous scholarships toassist journalism students. Finally, he wanted to leave a legacy that would encourage writers toremember the importance of quality. On his death, he gave two million dollars to ColumbiaUniversity so they could award prizes to great writers
The Pulitzer Prize recipients are a very select group. For most, winning a Pulitzer Prize isthe highlight of their career. If an author, journalist, or composer you know has won a PulitzerPrize, you can be sure they are at the top of their profession.a

Which sentence about Joseph Pulitzer is NOT true according to the reading passage?

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A massage is relaxing, and makes you feel great, but did you know that it's also good for you? That's what doctors are now saying. Massage relieves pain and anxiety, eases depression and speeds up recovery from medical problems.
Research has shown that people of all ages benefit from touch. Premature infants who are held develop faster than those left alone, and healthy babies who get a lot of physical contact cry less and sleep better. Researchers are not sure why this occurs but they have also found out that touch can slow heart rate, lower blood pressure and increase levels of seratonin, the brain chemical that is linked to well-being. It also decreases levels of the stress hormone cortisol, and this in turn increases your resistance to illness.
Massage also speeds up healing. Bone-marrow transplant patients who were given massages had better neurological function than those who weren't. Furthermore, massage reduced pain by 37% in patients with chronic muscle aches.
Giving someone a massage may be as good as getting one. A study conducted by the university of Miami found that mothers suffering from depression felt better after massaging their infants. In that same study, elderly volunteers who massaged infants reported feeling less anxious and depressed.
It even works when you do it yourself; 43% of headache sufferers reported getting relief after massaging their temples and neck and smokers who were taught self-massage while trying to quit felt less anxiety and smoked less.

Babies bom before their time     .

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Tuberculosis ............... incurable before.

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………… have enough apples, she’ll make an apple pie this afternoon.

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Gender inequality remains an everyday reality for the world’s women and girls. It can begin right at the moment of birth and continue throughout the course of a woman’s life. Despite critical advances over the course of recent history, women in all countries and across all socioeconomic levels in society can face various forms of unfair treatment, including discrimination, harassment, domestic violence and sexual abuse. Other forms of abuse that are particularly prevalent in certain countries or cultural contexts include forced marriage, honor killings, deprivation of education, denial of land and property rights, and lack of access to work and to health care. Women may experience human rights abuses at different points in their working lives, including during recruitment, hiring, promotion and termination processes, as well as in daily interactions with colleagues and supervisors. Outside of the workplace, women are often particularly vulnerable to the social and environmental impacts of business activities. For example, in many developing countries, women and girls are primarily responsible for fetching and hauling water. When company operations contaminate local sources, it is they  who carry the burden of walking, often for hours, to the nearest substitute, which can prevent them from working or going to school. According to the UN Entity for Gender Equality and the Empowerment of Women, gender “refers to the social attributes and opportunities associated with being male and female and the relationships between women and men and girls and boys, as well as the relations between women and those between men. These attributes, opportunities and relationships are socially constructed and are learned through socialization processes.” Furthermore, gender equality “refers to the equal rights, responsibilities and opportunities of women and men and girls and boys. Equality does not mean that women and men will become the same but that women’s and men’s rights, responsibilities and opportunities will not depend on whether they are born male or female.” Women and girls comprise half of the planet’s population; their empowerment is essential in expanding economic growth and promoting social development in a sustainable way. Evidence from around the world shows that gender equality advancements have a ripple effect on all areas of sustainable development, from reducing poverty, hunger and even carbon emissions to enhancing the health, well-being and education of entire families, communities and countries. In fact, “Equality between women and men is seen both as a human rights issue and as a precondition for, and indicator of, sustainable people-centered development.”  
4. The word “termination” in paragraph 3 can be replaced by _______

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Rome is the capital of Italy. This sprawling modern city has many ancient monuments. Rome’s history goes back more than 2,500 years. Because of its age, Rome is often called the Eternal City. Rome’s many art treasures and historic buildings make the city an important center of European culture. In ancient times, Rome was the center of a mighty Roman empire. The empire lasted nearly 500 years, into the ad 400s. Roman armies conquered the lands that are now Italy, Greece, Great Britain, France, and Egypt. The Romans built many roads from Rome to distant parts of their empire. This network of roads led to a saying that “All roads lead to Rome.” The Roman Empire’s influence is still present. The Romans spread their language, Latin, throughout Europe. Latin is the basis for Italian, French, Spanish, and other European languages. The ancient Romans were great builders. Several of their buildings still stand today. They are among Rome’s famous landmarks.The Pantheon is a temple dedicated to the many Roman gods of mythology. The Roman Colosseum is a four-story amphitheater. An amphitheater is like a football stadium. The Colosseum is where Roman citizens once watched gladiators fight to the death. The Roman Forum was the political center of ancient Rome. The senate building and law courts were there, along with shops and religious buildings. Many artists painted in Rome. The most famous of them is Michelangelo. He lived 500 years ago. Thousands of people visit Rome each year to see his art. Visitors to the Vatican stare in wonder at the beautiful murals that Michelangelo painted on the ceiling of the Sistine Chapel. The murals show scenes from the first book of the Bible, the Book of Genesis. Vatican City is the headquarters of the Roman Catholic Church. The pope lives at the Vatican. He is the head of the Catholic Church. There are more than a billion Catholics worldwide, making Roman Catholicism the largest Christian religion. Vatican City is an independent country within Rome. It is the smallest country in the world.
2. Rome is made an important center of European culture ______

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October brings attention to breast cancer, by raising awareness of treatment, research  and prevention. One local company is going a step above the rest, by offering a free home cleaning to a patient undergoing treatment. Cleaning for a Reason is an international organization that provides home cleanings for family members battling cancer.  “I am a breast cancer survivor myself, I was diagnosed in 2011. And so when I found out about this in 2014, after going through my experience of being extremely tired and just no energy at all to perform day to day tasks, that I realized this would be something that would greatly benefit the women in our community,” said Marlo Kanipe, owner of Deserved Comfort House Cleaning. The company partners with Cleaning for a Reason to provide the service locally.  Columbia native Lenora Floyd was diagnosed with breast cancer in 2018, and learned about Cleaning for a Reason from a flyer. “I was sitting at the table and I thought ‘that’s really something that would be such a huge help!’ Because I do most of the cleaning around the house, and I didn’t really know what to expect,” said Floyd. Floyd said having a clean home lifted a burden while she was going through a tough time. “It was just really nice to have that service, and one less thing not to have to worry about. Be able to rest instead of thinking ‘oh, I really need to vacuum up,’” said Floyd. “The chemotherapy and radiation really just takes a toll on your body. When someone is going through those times, the last thing you want to do is to have to do physical work. And house cleaning, of course, is physical work,” said Kanipe. “It’s nice to be able to take one small thing off of their plate. That they don’t have to worry about cleaning or keeping their house clean,” said Nicka Evans, a certified cleaning technician with Deserved Comfort. “This is what I do for work, it doesn’t seem like it’s a big deal. But to be able to come into someone’s house and see that it is a big deal and it’s important to them, it really means a lot to me.”  Since partnering with Cleaning for a Reason in 2014, Deserved Comfort has donated about $15,000 worth of cleanings. They will continue to help and be there for people as they battle cancer.
8. Which of the following can be inferred from the passage?

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Most households in the UK will have a broadband connection and a lot of those  houses will also have experienced connection or speed issues. But what if there was a way to connect to the internet and benefit from a direct connection with much faster speeds? Enter Li-Fi.  Li-Fi stands for Light Fidelity and is a Visible Light Communications (VLC) system which runs wireless communications that travel at very high speeds. With Li-Fi, your light blub is essentially your router. It uses common household LED light bulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.  Li-Fi and Wi-Fi are quite similar as both transmit data electromagnetically. However, Wi-Fi uses radio waves, while Li-Fi runs on visible light waves. This means that it accommodates a photo-detector to receive light signals and a signal processing element to convert the data into “streamable” content. For example, data is fed into an LED light bulb, it then sends data at rapid speeds to the photo-detector. The tiny changes in the rapid dimming of LED bulbs is then converted by the “receiver” into electrical signal. The signal is then converted back into a binary data stream that we would recognise as web, video and audio applications that run on internet-enabled devices.  While some may think that Li-Fi with its 224 gigabits per second leaves Wi-Fi in the dust, Li-Fi’s exclusive use of visible light could halt a mass uptake. Li-Fi signals cannot pass through walls, so in order to enjoy full connectivity, capable LED bulbs will need to be placed throughout the home. Not to mention, Li-Fi requires the light bulb is on at all times to provide connectivity, meaning that the lights will need to be on during the day. Additionally, where there is a lack of light bulbs, there is a lack of Li-Fi internet so Li-Fi does take a hit when it comes to public Wi-Fi networks.  However, using Li-Fi instead of Wi-Fi, you’ll negate lots of security problems associated with shared and often overloaded broadband networks. It will also be advantageous in areas where radio frequency waves do not reach. Due to its impressive speeds, Li-Fi could make a huge impact on the internet of things too, with data transferred at much higher levels with even more devices able to connect to one another. 
3. According to paragraph 3, what form does the transferred data from Li-Fi system take?

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Last week, China declared “mission accomplished” after landing a spacecraft, Chang’e-4, on the far side of the Moon. It was a remarkable endeavour. As the far side of the Moon never faces the Earth, mission control cannot communicate directly with the spacecraft, but only via an orbiting satellite. The terrain is more broken and cratered than the near side, so landing a craft is that much more difficult. Even Nasa was impressed: “a first for humanity and an impressive accomplishment!”. Yet mixed with admiration was trepidation. China, a latecomer to the space race, is now beginning to threaten the supremacy of America and Russia. But then Russia and America have long played their space exploration programmes for propaganda purposes. From the beginning, the space race was intimately bound up with the needs of the cold war. In 1957, the Soviet Union launched Sputnik, the first human craft to orbit the Earth. Four years later, Yuri Gagarin became the first man in space. Eight years later, on 21 July 1969, Neil Armstrong and Buzz Aldrin became the first humans to tread on the Moon. Their journey may have been fuelled in part by cold war desperation, but it was also an extraordinary triumph of knowledge and will, an act of the technological sublime. Once America was satisfied that the Soviet Union had been put in its place, space exploration became politically less important. As America downgraded its space ambitions, Chinese aspirations took flight. In 1992, the Chinese government approved the Shenzhou manned spaceflight programme. Eleven years later, Yang Liwei became the first Chinese astronaut in space. Fears about Chinese ambitions have been heightened by the changing context of the space race. During the cold war, America feared the Soviet Union, but was determined to thwart Moscow’s aims. Today, American apprehension stems from the worry that China’s emergence as the dominant global force cannot be checked, nor Beijing’s brutal despotism challenged. As liberal democracy frays in the west and authoritarian capitalism becomes entrenched in the east, self-doubt shapes US attitudes to China. Space exploration has long been fuelled by a mixture of humanistic dreams, technological leaps and tawdry politics. The Chang’e-4 mission is no different. How the space race will play out over the next decade, and what role China will adopt in global politics, remains uncertain. In the meantime, let us celebrate our new perspective of the dark side of the Moon.
5. According to paragraph 4, what is the current attitude of America concerning space conquest?

Swine influenza (also called swine flu, hog flu and pig flu) is an infection of a host animal by any one of several specific types of microscopic organisms called "swine influenza virus". A swine influenza virus (SIV) is any strain of the influenza family of viruses that is usually hosted by (is endemic in) pigs. As of 2009, the known SIV strains are the influenza c virus and the subtypes of the influenza A virus known as HI N1, H1N2, H3N1, H3N2 and H2N3. Swine influenza is common in pigs in the mid-western United States (and occasionally in other states), Mexico, Canada, South America, Europe (including the UK, Sweden and Italy) Kenya Mainland China, Taiwan Japan and other parts of eastern Asia.

Transmission of swine influenza vims from pigs to humans is not common and does not always cause human influenza, often only resulting in the production of antibodies in the blood. The meat of the animal poses no risk of transmitting the virus when properly cooked. If transmission does cause human influenza, it is called zoonotic swine flu. People who work with pigs, especially people with intense exposures, are at increased risk of catching swine flu. In the mid-20th century, identification of influenza subtypes became possible. This allows accurate diagnosis of transmission to humans. Since then, fifty confirmed transmissions have been recorded. Rarely, these strains of swine flu can pass from human to human. In humans, the symptoms of swine flu are similar to those of influenza and of influenza-like illness in general namely chills fever sore throat, muscle pains severe headache, coughing, weakness and general discomfort.

The 2009 flu outbreak in humans known as "swine flu" is due to a new strain of influenza A virus subtype H1N1 that contains genes closely related to swine influenza. The origin of this new strain is unknown. However, the World Organization for Animal Health (OIE) reports that this strain has not been isolated in pigs. This strain can be transmitted from human to human, and causes the normal symptoms of influenza.

The word "strain" can be replaced by.

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For hundreds of years, giving flowers have been a social means of communication. In the United States, flowers are often given during rites of passage, for commemorating special occasions or as a heartfelt gift between loved ones and friends. Flower gifting also occurs in most countries around the world. However, the meanings and traditions often vary. While students traditionally gave their favorite teacher an apple in past years, in China, teachers are given flowers. Peonies are by far the flower most often given in China. They are also quite popularly used for weddings. Strangely, potted plants are not considered a pleasant gift among Asian cultures. The people believe that like a plant confined by a pot, the gift symbolizes a binding or restriction. In Russia, in lieu of giving birthday presents, the guest of honor receives a single flower or an unwrapped bouquet. Floral arrangements or baskets are not given. Russians celebrate a holiday known as Woman’s Day. Traditional gifts include red roses, hyacinths or tulips. When there is a funeral or other occasion where someone wishes to express sympathy, carnations, lilies or roses are given in circular configurations, which signify the transition of birth, life and death to rebirth. In this instance, the color of choice is commonly yellow. For joyous occasions, arrangements and bouquets generally contain an odd number of flowers In the times of ancient Rome, brides carried flowers to scare away evil spirits and encourage fertility. The Dutch believed that flowers were food for the soul. When invited to someone’s home in Great Britain, it is tradition to bring a gift of flowers. All types are acceptable except white lilies, which are usually seen at funerals. Not unlike the United States, red roses are a symbol of love. Flowers are generally gifted in odd numbered increments regardless of the occasion. However, the Brits also have superstitions regarding the number 13, so the number is avoided. In the southern region of the continent, flowers are traditionally given during Christmas. Egyptians are much more conservative and restrict flower gifting to funerals and weddings. While certain flowers may have significant meanings for some, flowers in Las Vegas and across the United States flowers are an accepted gift for any reason desired.  
3. Why should not you give a potted plant to an Asian?

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The cities in the United States have been the most visible sponsors and beneficiaries  of projects that place art in public places. They have shown exceptional imagination in applying the diverse forms of contemporary art to a wide variety of purposes. The activities observed in a number of “pioneer” cities sponsoring art in public places - a broadening exploration of public sites, an increasing awareness among both sponsors and the public of the varieties of contemporary artistic practice, and a growing public enthusiasm - are increasingly characteristic of cities across the country. With many cities now undergoing renewed development, opportunities are continuously emerging for the inclusion or art in new or renewed public environments, including buildings, plazas, parks, and transportation facilities. The result of these activities is a group of artworks that reflect the diversity of contemporary art and the varying character and goals of the sponsoring communities.  In sculpture, the projects range from a cartoonlike Mermaid in Miami Beach by Roy Lichtenstein to a small forest planted in New York City by Alan Sonfist. The use of murals followed quickly upon the use of sculpture and has brought to public sites the work of artists as different as the realist Thomas Hart Benton and the Pop artist Robert Rauschenberg. The specialized requirements of particular urban situations have further expanded the use of art in public places: in Memphis, sculptor Richard Hunt has created a monument to Martin Luther King, Jr., who was slain there; in New York, Dan Flavin and Bill Brand have contributed neon and animation works to the enhancement of mass transit facilities. And in numerous cities, art is being raised as a symbol of the commitment to revitalize urban areas.  By continuing to sponsor projects involving a growing body of art in public places, cities will certainly enlarge the situations in which the public encounters and grows familiar with the various forms of contemporary art. Indeed, cities are providing artists with an opportunity to communicate with a new and broader audience. Artists are recognizing the distinction between public and private spaces, and taking that into account when executing their public commissions. They are working in new, often more durable media, and on an unaccustomed scale.
7. The word “that” in paragraph 3 refers to ____

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Men have always played critical roles in the women’s movement. But there is still a long way to go because despite all the progress made, men still dominate positions of power. And, as a string of recent harassment scandals has shown, the behaviour of some men has had profound effects on women’s careers, their success and their lives. The good news, as we mark International Women’s Day, is that many men are acknowledging the importance of playing their part to make gender equality a reality. A new study by Ipsos Mori has found that while a third of British men think they are being expected to do too much to support women’s equality, far more – half – do not. In fact, three in five men in Britain agree that gender equality won’t be achieved unless they also take action to support women’s rights. Despite attempts in some quarters to paint gender equality as a zero-sum game, there are plenty of win-win propositions for these men to advocate. Better parental leave for fathers would be a good start. Government policy needs to catch up with this new reality, and the evidence is clear that, unless paternity leave is non-transferable and well paid, uptake will be low. Sweden and Norway show us that the introduction of the “daddy quota” – the period of parental leave reserved specifically for fathers – has a positive effect on male take-up of parental leave, and then on men’s long-term involvement in household work and childcare. This reaps economic dividends, as women’s talents are no longer lost to the labour force, and having an involved father has a positive effect on children’s wellbeing. Globally, three-quarters (72%) agree that employers should make it easier for men to combine childcare with work. Businesses need not fear: research links flexible working to increased productivity, as better work-life balance leads to happier, more effective workers. Women gain from having flexible partners, too. A study of German couples found that having a partner who works flexibly boosted the wages of men and women, with the effect most pronounced for mothers. Conversely, women whose partners work very long hours are significantly more likely to quit the labour force – taking their talent and experience with them
3. The word “uptake” in paragraph 3 is closest in meaning to _______

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world/ the/ longest/ is/ The/ Thai name/ in/ the/ of/ Bangkok.

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The Nobel Prizes were established by the Swedish inventor, Alfred Bernhard Nobel. Nobel was the inventor of dynamite. (1) ____ his invention brought him much wealth and fame, Nobel realized how destructive dynamite could be. His own brother was (2) ____ in an explosion while working in the laboratory. Nobel thus spent a lot of time and energy promoting world peace to reduce the need to use dynamite in war. He also advocated the settlement of conflicts through diplomatic means. Before Nobel died, he (3) ____ his money to establish a fund. Every year, the interest from this fund was to be given to the person who has done the most good for mankind in that year. There are (4) ____ in the fields of physics, chemistry, medicine and literature. The most prestigious award, however, is the Nobel Peace Prize. This is given to the person who has done the most to promote world peace. One of the most (5) ____ persons to have received the award was Mahatma Gandhi of India

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
It is said that George Washington was one of the first to realize how important tire building of canals would be to the nation’s development. In fact, before he became the President, he headed the first company in the United States to build a canal, which was to connect the Ohio and Potomac rivers. It was never completed, but it showed the nation the feasibility of canals. As the country expanded westward, settlers in western New York, Pennsylvania, and Ohio needed a means to ship goods. Canals linking natural waterways seemed to supply an effective method.
In 1791, engineers commissioned by the state of New York investigated the possibility of a canal between Albany on the Hudson River and Buffalo on Lake Eric to link the Great Lakes area with the Atlantic seacoast. It would avoid the mountains that served as a barrier to canals from the Delaware and Potomac rivers.
The first attempt to dig the canal, to be called the Eric Canal, was made by private companies but only a comparatively small portion was built before the project was halted for lack of funds. The cost of the prospect was estimated $5 million, an enormous amount for those days. There was some on-again-off-again federal funding, but this time the War of 1812 put an end to construction. In 1817, DeWitt Clinton was elected Governor of New York and persuaded the state to finance and build the canal. It was completed in 1825, costing S2 million more than expected.
The canal rapidly lived up to its sponsors’ faith, quickly paying for itself through tolls. It was far more economical than any other form of transportation at the time. It permitted trade between the Great Lake region and the East coast, robbing the Mississippi River of much of its traffic. It allowed New York to supplant Boston, Philadelphia, and other eastern cities as the chief center of both domestic and foreign commerce. Cities sprang up along the canal. It also contributed in a number of ways to the Norths victory over the South in the Civil War.
An expansion of the canal was planned in 1849. Increased traffic would undoubtedly have warranted its construction had it not been for the railroads.

The word “tolls” in paragraph 4 is closest in meaning to which of the following?