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.
Example: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Example solution: Researchers did experiments on kids in order to find out _ .
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

Problem: Article: Some nations think they must have more and more babies, more and more people, if they are to remain strong and free. Actually, this is not so. Very often in history, small nations have conquered large ones. It's not so much the size of the army as its organization and the technical level of its weapons. Thus, Greece took over Persia in the 300s B.C., Great Britain took over India in the 1700s, even though Persia and India had far bigger population than Greece and Great Britain. If a nation wishes to avoid being dominated by its neighbors, its best chance is to raise its standard of living and its level of technology. _ can be done best by not allowing its population to grow to such a point that it is sunk in misery and poverty. In fact, the worst way in which a nation can try to avoid being dominated by its neighbor is to increase its population to the point of misery and poverty. If every nation tries to compete with its neighbors by raising its population, then the whole world will be sunk in misery and poverty. The nations will become weak in a disaster that will leave nothing behind that is worth dominating. No one will have gained anything. Everyone will have lost everything. Once all this is understood, and people generally agree that population growth must not be allowed to continue, they must also come to understand how that growth can be stopped. Population grows because more people are being born than are dying. There are two ways, then, in which the growth can be stopped. You can increase the number of people who die until it matches the number of people who are being born. Or else you can decrease the number of people who are born until it matches the number of people who are dying. The first method--increasing the death rate--is the usual way in which population is controlled in all species of living things other than ourselves, but we don't want that, for disaster lies that way. The intelligent way is to reduce the birth rate. But how can the birth rate be reduced?
Answer: it could still remain strong
Solution: It can be inferred from the passage that if a country had fewer people, _ .