In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: My father left me a treasure when he died. It wasn't a big house or a car. It wasn't cash or gold. In the eyes of the world my father died a poor man. He was a simple mechanic who worked hard to support his family. My father's treasure, rather, was in a thousand wonderful memories that he gave me over the course of his life. One particular one stood out in my mind today. I was just a boy playing in the backyard of a friend's house while my father spent the afternoon under the hood of an old car, trying to get it running again. It seemed to take hours and I wasn't sure whether he could bring the ancient car back to life again this time. At long last, though, he closed the hood and turned the key in the ignition . There was a sweet smile of satisfaction on his face as the engine started. There was a twinkle of joy in his eye when he shook his head. And there was a quiet hum of happiness in his voice as we drove back home that day. This memory made a home in my heart and became a priceless pearl for my soul to cherish. Time and time again, my father showed me that a kind life, a giving life and a heavenly life was created one choice at a time. Not all of his choices were the right ones, but most of them were. He did the best he could. He lived the best he could. And he helped to bring out the best in me, too. He once said to me, "It is lucky that all of your choices are driven by love and inspired by joy." As I look back into those memories my father left me, I realize that each one of them inspired me to live and to love. May all of your choices bring memories of happiness to those around you!
Answer: Memories of his father and himself.
What was the most precious thing the author's father passed on to him?

Article: Seventeenth-century houses in colonial North American were simple structures that were primarily functional, carrying over traditional designs that went back to the Middle Ages. During the first half of the eighteen century, however, houses began to show a new elegance. As wealth increased, more and more colonist built fine houses. Since architecture was not yet a specialized profession in the colonies, the design of buildings was left either to amateur designers or to carpenters who were engaged in translating architectural handbooks imported from England. Inventories of libraries shows an astonishing number of these handbooks for builders, and the houses built during the eighteenth century show their influence. Nevertheless, most household architecture of the first-quarters of the eighteenth century displays a wide _ of taste and freedom of application of the rules laid down in these books. Increasing wealth and growing sophistication throughout the colonies resulted in houses of improved design, whether the material was wood, stone, or brick. New England still favored wood, though brick houses became common in Boston and other towns, where the danger of fire gave an impetus to the use of more durable material. A few houses in New England were built of stone, but only in Pennsylvania and areas nearby was stone widely used in buildings. An increased use of brick in houses and outbuildings is noticeable in Virginia and Maryland, but wood remained the most popular material even in houses built by wealthy landowners. In the Carolinas, even in closely packed Charleston, wooden houses were much common than brick houses. Eighteenth-century houses showed great interior improvements over the former ones. Windows were made larger and shutters removed. Large, clear panes replaced the small leaded glass of the seventeenth century. Doorways were larger and more decorative. Fireplaces became decorative features of rooms. Walls were made of plaster or wood. White paint began to take the place of blues, yellows, greens, and lead color1s, which had been popular for walls in the earlier years. After about 1730, advertisements for wallpaper styles in scenic patterns began to appear in colonial newspapers.
Answer: The improved design of eighteenth-century colonial houses.
What's the passage mainly about?

Article: Since we started offering China private tour packages on North-America market in 2006, CTSI has enjoyed great reputation. Whether you design your tour route or choose one of our pre-designed packages, we will be able to provide a private tour for you.You will be served by professional bilingual personal guide, experienced bus driver and private air-conditioned van. Features Group organizer travels free, and even the Chinese visa is free. If you organize a group of 15 people or more with the same route, we will offer you, the organizer, a free trip, regardless of whether you design your own route or choose one of our tour packages.This is our way of showing gratitude to you as a tour organizer.We even give you a free Chinese Visa.Is that amazing? As an organizer, your main job is to find tour members.Once the tour route and travel arrangements are confirmed, your task as an organizer is completed and you get ready to enjoy the free trip. Pick your favorite Airlines Airfares are a big determining factor of the tour price.CTSI, with strong ties with almost all the airlines that fly between North America and Asia, offers the best price on flight tickets to China and meets various needs of customers. If you are seeking low-priced tickets to China, you can choose a flight with a layover ,such as Korean Air, Air Canada, and Cathay Pacific. Chinese Airlines usually offer huge discount on China domestic flights if you purchase both the international and China domestic parts together.[:,,Z,X,X,K] If you wish to save on flying time, we would recommend direct flight provided by America Airlines and United Airlines. Flexibility Sightseeing Spots: you can change or cancel, even add some sightseeing spots when you are on the tour. Timing: you set up the departure and return time of the day, as well as the sightseeing time in specific sightseeing spots. Trip cancellation: some member may cancel the trip in last minute, and huge fines may occur.Do not worry, if you can find someone to replace you, we save you more than 80% of the fines.
Answer: He should organize at least 15 tourists with the same route.
What should one do if he wants to enjoy a free trip?