In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
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Question: Article: Scientists have proved that sleeping and learning go hand in hand. Even a short nap can boost our memory and sharpen our thinking. But the relationship goes deeper than that. "The brain is not passive while you sleep," scientist Anat Arzi said. "It's quite active. You can do many things while you are asleep." Arzi and her coworkers didn't try to teach the sleeping volunteers any complex information, like new words or facts. Instead, the scientists taught volunteers to make new connections between smells and sounds. When we smell something good, like a flower, we take deep breaths. When we smell something bad, we take short breaths. Arzi and her co-workers based their experiment on these reactions. Once the volunteers fell asleep in the lab, the scientists went to work. They gave them a whiff of something pleasant and meanwhile played a particular musical note. They didn't wake up, but they heard--and sniffed deeply. Then the scientists gave the volunteers a whiff of something terrible and played a different musical note. Again, the volunteers heard and smelled--a short snort this time--but didn't wake up. The researchers repeated the experiment. After just four repetitions, volunteers made a connection between the musical notes and their paired smells. When the scientists played the musical tone that went with good smells, the sleepers breathed deeply. And when the scientists played the musical tone that went with bad smells, the sleepers breathed briefly--despite there being no bad smell. The next day, the volunteers woke up with the sound-smell connection. They breathed deeply when hearing one tone and cut their breaths short when hearing the other, which must have been unusual for them. Imagine walking down the street and taking a deep breath upon hearing a particular sound!
Answer: to make sound-smell connections

Answer: In the study, the volunteers were taught _ .

Question: Article: About 30 years ago, I left Cuba for the United States with my son. After getting settled finally in Brunswick, New Jersey, I enrolled my son in kindergarten. Several weeks later, my son's teacher asked me to meet him at his office. In the teacher's office, and exchange of greetings was followed by his questions: " Is your son mentally retarded ? Does he suffer from any kind of mental disability?" Was he talking about my wonderful Scola? No, no, it can't be. What a helpless, lonely moment! I told him that Scola was a quiet, sweet little boy, instead. I asked him why he was asking me all these questions. My son could not follow the teacher's directions, he told me, and thus, Scola was _ the class. Didn't he know my son did not speak English yet? He was angry: " Why hasn't your son been taught to speak English? Don't you speak English at home?" No, I didn't speak English at home, I replied. I was sure my son would learn English in a couple of months, and I didn't want him to forget his native language. Well, wrong answer! What kind of person would not speak in English to her son at home and at all times? " Are you one of those people who come to this country to save dollars and sent them back to their country, never wanting to be a part of this society?" Needless to say, I tried to tell him I was not one of " those people." Then he told me the meeting was over, and I left. As I had expected, my son learned to speak English fluently before the school year was over. He went on to graduate from college and got a job, earning close to six figures. He travels widely and leads a well-adjusted, contented life. And he has benefited from being bilingual . Speaking more than one language allows people to communicate with others; it teaches people about other cultures and other places- something very basic and obviously lacking in the "educator" I met in New Jersey.
Answer: to find a language partner for Scola

Answer: The teacher asked the author to his office _ .

Question: Article: Air pollution by sources ranging from cooking fires to auto fumes contributed to an estimated seven million deaths worldwide in 2012, the UN health agency has said. "Air pollution, and we're talking about both indoors and outdoors, is now the biggest environmental health problem, and _ is affecting everyone, both developed and developing countries," said Maria Neira, the World Health Organisation's public and environmental health chief. Globally, pollution was linked to one death in eight in 2012, new WHO research found. The biggest pollution-related killers were heart disease, stroke, pulmonary disease and lung cancer. The hardest-hit regions of the globe were what the WHO labels Southeast Asia, which includes India and Indonesia, and the Western Pacific, ranging from China and South Korea to Japan and the Philippines. Together, they accounted for 5.9 million deaths. The global death toll included 4.3 million deaths due to indoor air pollution, chiefly caused by cooking over coal, wood and biomass stoves. The toll from outdoor pollution was 3.7 million, with sources ranging from coal heating fires to diesel engines. Many people are exposed to both indoor and outdoor pollution, the WHO said, and due to that overlap the separate death toll attributed to the two sources cannot simply be added together, hence the figure of seven million deaths. The new figure is "shocking and worrying", Ms Neira told reporters. When it last released an estimate for deaths related to air pollution, in 2008, the agency had put the figure related to outdoor pollution at 1.3 million, while the number blamed on indoor pollution was 1.9 million. But a change in research methods makes comparison difficult between the 2008 estimate and the 2012 figures, Neira said. In the past, for example, the WHO did not take into account the overlap between exposure to both forms, and only assessed urban pollution. Satellite imagery has made it easier to assess rural pollution, and new knowledge about the health impact of exposure has enabled a better count. "The risks from air pollution are now far greater than previously thought or understood, particularly for heart disease and strokes," said Neira. "Few risks have a greater impact on global health today than air pollution. The evidence signals the need for concerted action to clean up the air we all breathe." According to the WHO, some 2.9 billion people in poor nations live in homes that use fires as their principle method of cooking and heating. Carlos Dora, the WHO's public and environmental health coordinator, said that turned homes into "combustion chambers". Simple measures to stem the impact include so-called "clean cook stoves", which are a low-tech option, as well as improved ventilation, he said. Countries also need to rethink policies, Mr Dora said, pointing to the impact in the developed world of a shift to cleaner power sources, more efficient management of energy demand, and technical strides in the auto industry. He also said transport policies needed a shake-up. With air pollution having sparked a recent scare in France, leading to restrictions on car use and the temporary scrapping of public transport fees in Paris, Mr Dora said such measures could be applied in the longer term. "You can't buy clean air in a bottle," he said."The air is a shared resource. In order to breathe clean air, we have to have interventions in the areas that pollute air." The WHO said it planned by the end of this year to release a ranking of the world's 1,600 most polluted cities.
Answer: Air pollution by sources ranging from cooking fires to auto fumes caused an estimated seven million deaths worldwide in 2012.

Answer:
The main idea of this article is that _ .