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: In 1901, H.G. Wells, an English writer, wrote a book describing a trip to the moon. When the explorers landed on the moon, they discovered that the moon was full of underground cities. They expressed their surprise to the "moon people" they met. In turn, the "moon people" expressed their surprise. "Why," they asked, "are you traveling to outer space when you don't even use your inner space?" H.G. Wells could only imagine travel to the moon. In 1969, human beings really did land on the moon. People today know that there are no underground cities on the moon. However, the question that the "moon people" asked is still an interesting one. A growing number of scientists are seriously thinking about it. Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The "Chunnel", a tunnel connecting England and France, is now complete. But what about underground cities? Japan's Taisei Corporation is designing a network of underground systems, called "Alice Cities." The designers imagine using surface space for public parks and using underground space for flats, offices, shopping, and so on. A solar dome would cover the whole city. Supporters of underground development say that building down rather than building up is a good way to use the earth's space. The surface, they say, can be used for farms, parks, gardens, and wilderness. H.G. Wells' "moon people" would agree. Would you?
Answer: lived in so many underground cities

Answer: The explorers in H. G. Wells' story were surprised to find that the "moon people" _ .

Question: Article: Pets provide an unconditional love that requires very little on the part of the human. Animals are so special to those of us who love them. We miss them when they are no longer with us. We grieve for them in ways which are just the same as grieving for a human loved one. Whether the end comes through old age, illness, or sudden death, the death of a pet can cause enormous feelings of sorrow, guilt, and loneliness for children and adults alike, as the animal was considered a family member, a child's favoured playmate, or an older person's loyal and faithful companion. Some people don't want a pet because they do die! It's understandable to be unwilling to expose yourself to death but, at the same time, _ . When we live with animals we're more in step with the rhythms of the planet from day to night and from season to season because our companions make us more aware of the changes around us. Our companion animals teach us about the simple gifts of a beautiful day, a good meal and a gentle touch. The death of a pet can make us struggle with our belief structure-a natural part of the grieving period. Whether grieving an animal or human, we question our beliefs and many people find their belief structure becomes stronger when they ask themselves hard questions. Others find a new way of acceptance. And we learn from our animals. Animals aren't afraid to die; they show us that the end of life can be faced without fear. They can teach us to accept death as an opening for love and wonder. Allow yourself to grieve in whatever way is appropriate for you. The loss of a pet is real grief and causes us to travel through the stages of grief-denial, anger, depression, guilt, and acceptance. These stages must be lived through for the mourning to allow full healing.
Answer: pets only provide people with love but never ask for return

Answer: According to the passage, the reason why some people don't want a pet may be that _ .

Question: Article: American this year will swallow 15,000 tons of aspirin, one of the safest and most effective drugs invented by man. The most popular medicine in the world today, it is an effective pain reliever. Its bad effects are ly mild and it is cheap. For millions of people suffering from arthritis . It is the only thing that works. Aspirin, in short, is truly the 20th-century wonder drug. It is also the second largest suicide drug and is the leading cause of poisoning among children. It has side effects that, although ly mild, are largely unrecognized among users. Although aspirin was at first sold by a German company in1899, it has been around much longer than that. Hippocrates, in ancient Greek, understood the medical value of the leaves and tree bark which today are known to contain salicylates , the chemical in aspirin. During the 19thcentury, there was a great deal of experimentation in Europe with this chemical, and it led to the introduction of aspirin. By 1915, aspirin tablets were available in the United States. A small quantity of aspirin (two-grain tablets) relieves pain and inflammation. It also reduces fever by interfering with some of the body's reactions.
Answer: discusses the good effects of aspirin

Answer:
The passage is written to _ .