{#blank#}1{#/blank#} (locate) in a mountainous region of Chengde city, the Jinshanling Great Wall section is the {#blank#}2{#/blank#} (good) preserved part of the Great Wall from the Ming Dynasty with many {#blank#}3{#/blank#} (origin) features.

    Three towers are must-sees at the Jinshanling Great Wall. Each tower contains {#blank#}4{#/blank#} own legend. The General Tower was named to commemorate Wu Guihua, a heroine who sacrificed herself to resist invasions {#blank#}5{#/blank#} the north. The Black Tower and the Taochun Tower were named to commemorate two girls, Heigu and Taochun, {#blank#}6{#/blank#} made great contributions to the construction of the Great Wall.

    If you go, you will find yourself experiencing {#blank#}7{#/blank#} (total) different scenery in four seasons. In spring, apricot flowers decorate the Great Wall. In summer, the winding dragon-shaped Great Wall {#blank#}8{#/blank#} (surround) by a sea of green plants. In autumn, the Great Wall turns into a colorful place and in winter, heavy snow covers the Great Wall, {#blank#}9{#/blank#} (add) a sense of magnificence and solemnity.

    The annual Apricot Flower Festival kicks off at the beginning of April. If you have time, you should witness the true {#blank#}10{#/blank#} (beautiful) of the China's landmark.

    Polar bears are suffering in a {#blank#}1{#/blank#} (warm) world.

    Polar bears live in environments too cold for most animals. {#blank#}2{#/blank#} much of the year, they live and hunt on the frozen Arctic sea ice. Nature has prepared {#blank#}3{#/blank#} for the cold conditions. But nothing has prepared the bears for the danger that {#blank#}4{#/blank#} (threat)the only home they know.

    The polar bears' world is melting. Studies show that the polar ice has reduced by 9.8% every 10 years {#blank#}5{#/blank#} 1978. Now about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend on the sea ice for their {#blank#}6{#/blank#}． (survive). “The sea ice is more than just this platform that the bears walk over,” says Andrew Derocher, {#blank#}7{#/blank#} scientist who studies North American polar bear populations. “{#blank#}8{#/blank#}  it, they can't exist.”

    Some melting and refreezing of the polar ice is natural. {#blank#}9{#/blank#} in a warmer world, these cycles speed up, and bears have less time to hunt. Normally, they have three months in the spring when they gain more weight. The extra fat is used later, {#blank#}10{#/blank#} the bears are not actively hunting.

    One day, about ten years ago, while working at the cash register (收银机) in the gift shop at my University Museum of Natural History, I saw {#blank#}1{#/blank#} elderly couple come in with a little girl in a wheelchair. As I looked {#blank#}2{#/blank#}(close) at this girl, I found that she was fixed on her chair. I then realized she had no arms or legs, just a head, a neck and upper body,{#blank#}3{#/blank#} (dress) in a little white skirt. As the couple wheeled her up to me, I turned my head toward the girl. When I took the money from her grandparents, I looked back {#blank#}4{#/blank#} the girl, who was giving me the most optimistic, largest smile I had ever seen. All of a sudden, her handicap (障碍) was gone and all I saw was this beautiful girl,{#blank#}5{#/blank#}smile just melted me {#blank#}6{#/blank#}almost instantly gave me a completely new sense of {#blank#}7{#/blank#}life is all about. She took me from a poor, unhappy college student and {#blank#}8{#/blank#}(bring) me into her world; a world of smiles, love and {#blank#}9{#/blank#}(warm). I'm a successful business man now and whenever I think about the troubles of the world, I think about that little girl and the remarkable (非凡的) lesson about life that she taught {#blank#}10{#/blank#}.

    Bill Gates has said China is the best place for{#blank#}1{#/blank#}young to fulfill their ambitions to make the world a better place. In a lecture to Peking University students, he described the skepticism(怀疑论) in some developed countries about{#blank#}2{#/blank#} globalization works for ordinary people. He said the results of the US presidential election and the Brexit (英国脱欧) vote showed how any country may turn inward when{#blank#}3{#/blank#}(face) with difficult issues like immigration, security and global development.

    In a world suddenly short of experienced leaders, Gates praised China for shouldering{#blank#}4{#/blank#}great) responsibility for significant global issues like climate change and inclusive development. Gates told hundreds of students {#blank#}5{#/blank#}(attend) the lecture of his high hopes for China's youth, for they enter the work force at the time of China's rise{#blank#}6{#/blank#} a center of global progress and innovation(创新).

    "The world's eyes are on China{#blank#}7{#/blank#} (specific) on all of you. What an incredible thing is the belief {#blank#}8{#/blank#}you can make the world a better place. Now it is the best moment that you{#blank#}9{#/blank#}(have)," he said. "No matter what, if your ambition is to improve the world, this is the best time and the best place {#blank#}10{#/blank#}(struggle) for it."