Urbanization and Its Influence Over half the world’s people now live in cities. The latest "Global Report on Human Settlemen

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问题                                                 Urbanization and Its Influence
    Over half the world’s people now live in cities. The latest "Global Report on Human Settlements" says a significant change took place last year. The report【C1】________this week from U.N. Habitat, a United Nations agency.
    A century ago,【C2】________than five percent of all people lived in cities.【C3】________the middle of this century it could be seventy percent, or【C4】________six and a half billion people.
    Already three-fourths of people in【C5】________countries live in cities. Now most urban population【C6】________is in the developing world.
    Urbanization can lead to social and economic progress, but also put【C7】________on cities to provide housing and【C8】________. The new report says almost two hundred thousand people move【C9】________cities and towns each day. It says worsening inequalities,【C10】________by social divisions and differences in【C11】________, could result in violence and crime unless cities plan better.
    Another issue is urban sprawl (无序扩展的城区). This is where cities【C12】________quickly into rural areas, sometimes【C13】________a much faster rate than urban population growth.
    Sprawl is common in the United States. Americans move a lot. In a recent study, Art Hall at the University of Kansas found that people are moving away from the【C14】________cities to smaller ones. He sees a【C15】________toward ‘de-urbanization" across the nation.
【C3】

选项 A、By
B、Along
C、Through
D、To

答案A

解析 along:沿着。through:通过、穿过。表示时间的节点用by,by the middle of this century,在本世纪中叶。
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