①British economy has been {#blank#}1{#/blank#} (衰退) since 1960s.

②Nothing would satisfy her {#blank#}2{#/blank#} (贪婪) for power.

③It makes mesad that some people {#blank#}3{#/blank#} (犯罪) crimes and never get punished.

④He felt{#blank#}4{#/blank#} (气馁) because of allthe criticism he'd received.

⑤My brother is {#blank#}5{#/blank#} (喜爱) of pointing out my mistakes.

⑥After the earthquake, the city {#blank#}6{#/blank#} (像) a battlefield.

⑦There can be no excuse for anyfurther {#blank#}7{#/blank#} (耽搁).

⑧As a consequence of smoking, myfather coughs {#blank#}8{#/blank#} (频繁).

⑨Her moods were very {#blank#}9{#/blank#} (易变的), now laughing loudly, and then sunk in despair.

⑩Rosa Parks challenged the unjust {#blank#}10{#/blank#} (分离；分开) of people on the basis of skin color.

    Rivers are one of our most important natural resources. A n{#blank#}1{#/blank#} of the world's great cities are located on rivers, and almost each country has at least one river f{#blank#}2{#/blank#} through it that p{#blank#}3{#/blank#} an important part in the lives of its people.

    Since the beginning of history, people have been using rivers for transportation. The longest one in the United States is the Mississippi, and the lifeline of Egypt is the Nile. A{#blank#}4{#/blank#} from transportation, rivers give water to drink, water for crops, and chances for fun and recreation for the people who live along their banks.

    However, large cities and industries that are located on rivers often make problems. As the cities grow in size and industries increase in number, the water in the rivers becomes p{#blank#}5{#/blank#} with chemicals and other harmful materials.

    Experts a{#blank#}6{#/blank#}that environmental organizations should work together with different communities and countries to find solutions to the serious environmental problem. As c{#blank#}7{#/blank#} of the Earth, we all have a responsibility to preserve and sustain the environment we have-for ourselves and our future generations. After all, there is no s{#blank#}8{#/blank#} for our Earth. It's all we've got to live on.