The history of air conditioners (空调) started in the early days with the need to preserve food. The food{#blank#}1{#/blank#}is kept at room temperature spoils easily due to the growth of bacteria. At temperature below 4℃, the growth of bacteria reduces{#blank#}2{#/blank#}(rapid). As a result of the development in food refrigeration, other following applications include air conditioning and manufacturing processes.

    The{#blank#}3{#/blank#}(discover) of the principles of the absorption type of refrigeration in 1824 showed that liquefied ammonia (液氨) could cool air. At first, the commercially available use of air conditioning applications was based on the need to cool air for industrial processes rather than {#blank#}4{#/blank#}(person) comfort. The first electrical air conditioning{#blank#}5{#/blank#}(invent) by Willis Haviland Carrier in 1902. He was also known{#blank#}6{#/blank#}the Father of Modern Air Conditioning.{#blank#}7{#/blank#} (he) invention was designed to improve the manufacturing process of a printing factory. By{#blank#}8{#/blank#}(control) the temperature, the process was made more efficient.

    The Carrier Air Conditioning Company of America was set up by him {#blank#}9{#/blank#}(meet) the demand of better productivity in the workplace. Today, Carrier Corporation is{#blank#}10{#/blank#}biggest air conditioner manufacturer and marketing corporation in the world in central air conditioning.

    Long time ago, a boy {#blank#}1{#/blank#}(name) Bob met a new friend in QQ, she is Larry.   Larry works with Transport Drivers. Inc. One morning in 2009, Larry was traveling along 165 north after delivering to one of his customers when he saw a car{#blank#}2{#/blank#}its bright lights on. As he got even{#blank#}3{#/blank#}(close), he found another vehicle upside down on the road. One more look{#blank#}4{#/blank#}he noticed fire shooting out {#blank#}5{#/blank#}(repeat) from under the disabled vehicle. Larry pulled over, set the brake and got hold of the fire extinguisher (灭火器). Two good bursts from the extinguisher and the fire {#blank#}6{#/blank#}(put) out.

    The man who had his bright lights on came over and told Larry he had made a call. They then heard a woman's voice coming from the damaged vehicle.{#blank#}7{#/blank#} (approach) the vehicle, they saw that a woman was trying to get out of the broken window. They told her to stay still, but she thought the car was going to explode. Larry told her that he had already put out the fire.

    Once fire and {#blank#}8{#/blank#}(emergent) people arrived, Larry and the other man backed off and let them go to work. Then, Larry asked the police {#blank#}9{#/blank#}he was needed or free to go. They let him and the other man go.

    One thing is for certain—It {#blank#}10{#/blank#}(be) his efforts that most likely saved the woman's life.

    Paper-cutting was recognized as a national cultural heritage(遗产)in 2006. According to experts, paper-cutting conveys the culture shared between China {#blank#}1{#/blank#} the West to wish for family reunions and maintain links with loved ones, alive or dead.

    In the movie Coco, for instance, the 12-year-old Miguel and his family dance and sing to celebrate the Day of the Dead, a {#blank#}2{#/blank#} (tradition)festival in Mexico, when colorful paper-cuts are hung on the street. Chinese people also cut images of small figures {#blank#}3{#/blank#} (call) back the spirits of the dead. The difference is that most Chinese paper-cuts are red, while those in other countries {#blank#}4{#/blank#} (be) often made in many other colors.

    Fairy tale writer Hans Christian Andersen liked to cut {#blank#}5{#/blank#} (character), such as princesses and angels, out of paper while {#blank#}6{#/blank#} (tell) stories to children. In China, female friends and family members used to chat and make paper-cuts together.

    “{#blank#}7{#/blank#}the patterns and colors may be different, paper-cuts share the same function of maintaining emotional ties among people, "says Yang Huizi, {#blank#}8{#/blank#} art teacher at Beijing Union.

    Yang {#blank#}9{#/blank#} (study) and performed the art for over a decade. Besides routine university courses, she also organizes nonprofit paper-cutting activities {#blank#}10{#/blank#}are open to the public in Beijing to promote basic knowledge of paper-cutting.

    Ballet is a formal kind of dance performance with a rich and interesting history. The word "ballet" comes from the French language, and {#blank#}1{#/blank#} (be) based on the Italian word "balletto." "Balletto" means a little dance. Ballet's early roots began in Italy in the late 1400s. But it was in France {#blank#}2{#/blank#} ballet developed into the form we know today.

    The French ruler Louis the Fourteenth had a big influence {#blank#}3{#/blank#} the direction of ballet in its early history. He ruled France for seventy-two years, {#blank#}4{#/blank#} (start) in 1643. He started dancing as a boy and worked hard daily.

    Louis the Fourteenth turned ballet into a form of dance that reflected {#blank#}5{#/blank#} (he) power and influence. Ballet's many rules and {#blank#}6{#/blank#} (extreme) detailed movements expressed a person's power and social relations. The king made sure that ballet became a {#blank#}7{#/blank#} (require) for the people of his court. He also started the Royal Academy of Dance, {#blank#}8{#/blank#} important people could learn this art. The aim of this dance was self-control, order and perfection.

    Ballet slowly changed from a dance at the king's court to one {#blank#}9{#/blank#} (perform) by professional dancers. When Louis the Fourteenth died in 1715, ballet {#blank#}10{#/blank#} (bring) to other parts of Europe and was developing in other ways.

    Chocolate was first used as a drink over 3,500 years ago in Central America. It was very popular with the Mayans and the Aztecs. In fact, cocoa beans were very important to people there. That was {#blank#}1{#/blank#} they were used as money. In the beginning, cocoa  {#blank#}2{#/blank#}  (plant) in Ecuador, which was, for a long time, the world's number-one producer of cocoa beans. It is still one of the top {#blank#}3{#/blank#} (producer) of the beans, but nowadays more than 70 per cent of cocoa beans come from West Africa.