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.

[Q]: Article: . As the world's largest terrestrial carnivore ,the polar bear is the king of the great white north. Adult males can measure more than 9 feet in length and weigh between 770 and 1,430 pounds. The bear's body and neck are elongated, and the head is narrow and long with small, rounded ears. Polar bear populations can be found in northern Canada, Greenland, Norway and Russia, and there have been reports that polar bear tracks have been found as far north as the North Pole. The 5,000,000-square-mile range of the polar bear circles the Arctic and contains stretches of open water where seals are easily caught. Polar bears live on the annual Arctic sea ice that provides a platform from which they can hunt. They hunt seals on the sea ice by breaking into seal dens in the sea ice. The dens aren't visible from above,but seeing is less important than smelling to a polar bear -- with their keen sense of smell,polar bears can sense the breathing holes of seals in their dens beneath the snow and ice. As the southern edge of the Arctic ice cap melts in summer, polar bears are stranded on land and spend their summers fasting ,living off body fat stored from hunting in spring and winter. It might come as a surprise that this species faces an uncertain future. Climate change is causing the disappearance of sea ice from which polar bears hunt seals. Sea ice in the Arctic is melting earlier and forming later each year. With about 22,000 polar bears living in the wild,the species is not endangered at the moment, but its future is far from certain. People have reached an agreement that controls the hunting of polar bears and directs each nation to protect their habitats, but it does not protect the bears against the biggest man-made threat to their survival : global warming. If current warming trends continue, scientists believe that polar bears may disappear within 100 years.
Answer: necks
[A]: Polar bears search for seals mainly through their _ .

[Q]: Article: A person who is deaf when he is born is usually dumb as well. There may be nothing wrong with his mouth and tongue, but he cannot speak. This is because he cannot hear people, so he has nothing to imitate . He may try to make sounds himself, but cannot hear his own voice. However, even though he finds it difficult to speak and cannot hear, he can learn to read. Nowadays such persons can also be taught to speak because we have modern methods and equipment, but we did not have these when Helen Keller was born. Even with modern methods and equipment, however, it is not easy for deaf children to learn to speak, though most of them succeed. When a child is deaf and blind as well, it becomes much more difficult, though it is possible. Helen Keller was born in 1880. She became very ill at the age of nineteen months. Medical knowledge was not as great then as it is now. She did not die but lost her sight and hearing. As a result, she became dumb as well. Her parents did their best to teach her, but she couldn't speak by the age of six. Then, in 1887, a teacher, Miss Sullivan, came to live with her. Miss Sullivan herself had been blind. She had been partly cured. Though she could not see very well, she was not blind. Helen was a difficult pupil at first, but in a month Helen had learned how to understand signs and how to make them herself. At last in spite of her great difficulties, Helen learned to read, write and speak, even though she was deaf and blind. She even went to college and had full education. She wrote many books, and though other people have written books about her, her own books are the ones that best explain how it feels to be deaf, dumb and blind. Her best book is The Story of My Life. Perhaps you have read it. Though it was written in 1902, it is still a very interesting book. Even if you have not read it, you may have heard of Helen Keller.
Answer: he cannot hear other people and he has nothing to imitate
[A]: A person who is deaf at birth is also dumb because _ .

[Q]: Article: One night there was a woman at the airport who had to wait for several hours before getting her next flight. While waiting, she bought a book and a pack of biscuits to spend the time. She looked for a place to sit and waited. She was reading her book, when suddenly she realized that there was a young man sitting next to her who was stretching his hand, and grabbing the pack of cookies lying between them. He started to eat them one by one. Not wanting to make a fuss about it ,she decided to ignore him. The woman ate the biscuits and watched the clock, while the young thief was also eating them. The woman started to think, "If I weren't such a good and educated person, I would have hit this man by now." Every time she ate a biscuit, he had one, too. The dialogue between their eyes continued and when only one biscuit was left, she wondered what he was going to do. Softly and with a nervous smile, the young man grabbed the last biscuit and broke it into two. He offered one half to the woman while he ate the other half. Briskly she took the biscuit and thought, "What a bad man! How uneducated! He didn't even thank me!" She had never met anybody who made her so angry, and was pleased when her flight was ready. She grabbed her bags and went towards the gate not looking back to where that thief was seated. After getting on the plane and being seated, she looked for her book which was almost finished by now. While looking into her bag she was totally surprised to find her pack of biscuits. "If my biscuits are here," she thought, feeling bad, "those others were his and he tried to share them with me."Too late to say sorry to the young man, she realized with pain, that it was her who had been an uneducated thief, but not him.
Answer: because the young man wanted to eat it
[A]:
According to the passage, the woman bought the biscuits _ .