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: Human beings have spread to every continent, sometimes driving other animal species to extinction in the process.It has become the most widely spread species on the planet, occupying mountains and valleys, deserts and jungles, shorelines and islands, yet always finding some good means of living in these widely differing environments. The total weight of all living members of the species is far heavier than that of any other animal, and the human population is now growing so rapidly that it will double within the next thirty-five years. What accounts for the success of our species? The answer, in a word, is culture. We create culture, but culture in turn creates us.We are consequently no longer the victims of the environment.We make our own social environment, inventing and sharing the rules and patterns of behaviour that shape our lives and we use our learned knowledge to make the natural environment more suitable to live in. Our shared culture is what makes social life possible. Without a culture transmitted from the past, each new generation would have to solve the most basic problems of human existence over again. It would have to think up a family system, to invent a language, to discover fire , to create the wheel, and so on. Culture frees us from relying on the slow and accidental process of physical evolution by offering us a new, purposive , efficient means of adapting to changing conditions. If we waited for natural selection to enable us to live at the North Pole, to fly to the moon, or to live under the sea , we would wait forever. Unlike other animals, we can self-consciously adapt to our environments and can adapt environments to meet our own needs.
Answer: change social environment and make natural environment
Solution: According to the passage , human beings _ .