Disposing(处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste disposal problem becomes {#blank#}1{#/blank#}(increase) difficult.

    During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot{#blank#}2{#/blank#}a dump site(垃圾场). People {#blank#}3{#/blank#} (transport) household rubbish, rotted wood, and old possessions to the site. Regularly some of the trash was burned and the rest was buried. The {#blank#}4{#/blank#} (pleasant) sights and smells caused no problem because nobody lived close by. Factories mills (制造厂), and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted {#blank#}5{#/blank#} (remaining) into the water. Others built huge burners with chimneys to deal with the problem.

    Several facts make these choices {#blank#}6{#/blank#} (accept) to modern society. The first problem is space. Dumps,{#blank#}7{#/blank#}are now called landfills, are most needed in heavily populated areas. Such areas rarely have empty land suitable for this purpose. The land is either too expensive or too close to residential neighborhoods. A long distance dump has been a common practice,{#blank#}8{#/blank#} once farm areas are refusing to accept rubbish from elsewhere, cheap land within trucking distance of major city areas is nonexistent.{#blank#}9{#/blank#} (aware) of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow.

    {#blank#}10{#/blank#} (recycle) efforts have become commonplace, and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with only about 50 percent of a city's reusable waste.

    Wang Kun and his sister, Wang Wei, {#blank#}1{#/blank#}(dream) about taking a great bike trip ever since middle school. Each of them bought a mountain bike. Wang Wei even got their cousins, Dai Wei and Yu Hang, interested in {#blank#}2{#/blank#} (cycle) when she visited them at their college in Kunming. After graduating {#blank#}3{#/blank#}college, Wang Kun and Wang Wei {#blank#}4{#/blank#}(final) got the chance to take a bike trip. {#blank#}5{#/blank#}was Wang Wei {#blank#}6{#/blank#}first got the idea to cycle along the Mekong River from where it begins to where it ends. Then Wang Wei planned the schedule for the trip. {#blank#}7{#/blank#}Wang Kun had some doubts, Wang Wei was determined and insisted that she organize the trip properly. Knowing that she was a stubborn girl, {#blank#}8{#/blank#}decision could not be changed once she had made {#blank#}9{#/blank#}her mind, Wang Kun had to give in. Before the trip they went to the library and found a large atlas with good maps {#blank#}10{#/blank#}helped them know more about the Mekong River.

    In recent years, Internet voting has become {#blank#}1{#/blank#}（increase）popular in China. People not only cast on-line votes {#blank#}2{#/blank#}(them), but also urge others to vote for{#blank#}3{#/blank#}(compete) like the "Most Beautiful Teacher" and the " Cutest Baby".

    Lin Yue, a high school student, is invited to vote in the "Best Police Officer ", {#blank#}4{#/blank#}(organize) by the local government to let the public have{#blank#}5{#/blank#}better understanding of police officers' daily work. Lin Yue visits the website and reads all the stories. He is deeply moved by {#blank#}6{#/blank#}glorious deeds. He is already thinking of becoming a policeman himself in the future.

    Wu Hua is invited by his uncle to vote for his cousin in the "Future Singer". He {#blank#}7{#/blank#}(receive)three similar invitations so far. His uncle tells him {#blank#}8{#/blank#}his cousin wins it, the family will win an overseas tour{#blank#}9{#/blank#}free. Wu Hua likes his cousin very much, but he finds other singers perform much{#blank#}10{#/blank#}(well). To vote, or not to vote? This is a question that troubles him very much.