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              Most new babies were born in the developing countries. These countries are found in Africa, South America and parts of Asia. In the developed countries of Europe and North America, the population is growing very slowly. This is because women in these countries have, on average (平均), only one or two children. In the developing countries, many women have five or more children. In 1950, about one quarter of the world’s population lived in the developed countries. By 2050, these countries will be home to only about one tenth of the world’s people.

              In the developing countries, more than one billion people are still living below the poverty(贫困) line. These people do not have enough food to eat and they live in poor housing conditions. Children get little time at school and suffer (遭受痛苦) from many kinds of diseases（疾病）.

              At the beginning of the 21st century, the world’s population was around six billion（十亿）. The U.N. has said that the world’s population will level off (平稳下降) at 12.5 billion by the year 2100. Other groups think the world’s population will continue to grow, reaching 14 billion before it becomes stable (稳定的), or even falls.

              根据短文内容，回答下列问题。

              (1) In what areas of the world can developing countries be found?

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              (2) In 1950, what percent of the world’s population lived in developing countries?

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              (3) How to describe the people who are living below the poverty line?

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              (4) At the beginning of the 21st century, the world’s population was around sixty billion，wasn’t it?

              ________________________________________________

              (5) 将文中画线部分翻译成汉语。

              ________________________________________________。

              难度：较难
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