A fifteen­year­old boy named Justin Foster in Dover，New Hampshire went missing two days ago. {#blank#}1{#/blank#} was not until the lunchtime the next day that he was found missing. His mother became{#blank#}2{#/blank#}(worry) and asked her husband to call the police. People offered various explanations for his {#blank#}3{#/blank#}(appear). Kelly，his sister said that Justin {#blank#}4{#/blank#}return home the night before and even heard him put on his favourite CD，{#blank#}5{#/blank#}just then she happened to see a large spaceship {#blank#}6{#/blank#}(fly) outside，so she thought Justin must {#blank#}7{#/blank#}(take) away by aliens. Some people also said that they themselves experienced this kind of thing. But Detective Sam Peterson，who took charge {#blank#}8{#/blank#}the case，said that there was really no  hard {#blank#}9{#/blank#}(evident) that aliens took him and that they wouldn't give up until they found out {#blank#}10{#/blank#}had happened.

    Sun Yat-sen,{#blank#}1{#/blank#} was the leader of the 1911 Revolution, first suggested the idea of a dam across the Yangtze River in 1919. Three quarters of China's energy {#blank#}2{#/blank#} (produce) by burning coal. In 1993, China used 1.2 billion tons of coal for heating and generating{#blank#}3{#/blank#}(electric).{#blank#}4{#/blank#} (fortunate), burning coal causes serious air pollution and increases global warming. The dam will generate electricity equal{#blank#}5{#/blank#} about 40 million tons of coal without causing so much air pollution.

    Diets have changed in China-and so too has its top crop. Since 2011,the country{#blank#}1{#/blank#}（grow）more corn than rice. Corn production has jumped nearly 125 percent over{#blank#}2{#/blank#}past 25 years, while rice has increased only 7 percent.

    A taste for meat is{#blank#}3{#/blank#}(actual) behind the change. An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn's rise. The government encourages farmers to grow corn instead of rice{#blank#}4{#/blank#}(improve) water quality. Corn uses less water{#blank#}5{#/blank#}rice and creates less fertilizer(化肥) runoff. This switch has decreased{#blank#}6{#/blank#}(pollute) in the country's major lakes and reservoirs and made drinking water safer for people.

    According to the World Bank, China accounts for about 30 percent of total{#blank#}7{#/blank#}(globe)fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005-when the government {#blank#}8{#/blank#} (start) a soil-testing program {#blank#}9{#/blank#} gives specific fertilizer recommendations to farmers - and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China's approach to protecting its environment while {#blank#}10{#/blank#} (feed) its citizens "offers useful lessons for agriculture and food policymakers worldwide." says the bank's Juergen Voegele.

    It is well known that the Chinese have great respect for their elders, and here is an occasion to show it-the Chongyang Festival. It falls {#blank#}1{#/blank#} the ninth day of the ninth lunar month. In Chinese, nine {#blank#}2{#/blank#}(regard) as the number of "yang". The ninth day of the ninth month is the day that has two "yang" numbers, and "chong" in Chinese means double, which is {#blank#}3{#/blank#} the name "Chongyang" came into being.

    The festival can date back to the Warring States Period. However, it was not {#blank#}4{#/blank#} (formal) set as a festival until the Tang Dynasty. In 1989, the Chinese government {#blank#}5{#/blank#}(declare)the ninth day of the ninth lunar month to be Seniors' Day-a day to respect {#blank#}6{#/blank#} elderly and to let them enjoy {#blank#}7{#/blank#}(they).

    Traditionally, people climb mountains, drink chrysanthemum (菊花) wine, and eat double-ninth cakes. Since cake in Chinese is pronounced "gao" meaning"high", people consider climbing a high mountain to be the same as eating cake in the hope of {#blank#}8{#/blank#} (promote) to high positions. And people often think that chrysanthemum wine can get rid of all kinds of diseases and {#blank#}9{#/blank#}(disaster).

    Today many activities are held {#blank#}10{#/blank#}(show) respect for the seniors like organizing a trip for them, sending them gifts and more on the day of the festival.