2. 外语
  3. Fifty years from now the world’s population will be declining, with no end in【B1】______.Several centuries from now, unless peopl

Fifty years from now the world’s population will be declining, with no end in【B1】______.Several centuries from now, unless peopl

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问题     Fifty years from now the world’s population will be declining, with no end in【B1】______.Several centuries from now, unless people’s values changes【B2】______, there could be fewer people living in the entire world than live in the United States today. The big【B3】______of the past twenty years is that in not one country did fertility stop falling when it reached the【B4】______rate -- 2.1 children per women. In Italy, for example, the rate has【B5】______to 1.2. In Western Europe as a whole and in Japan it is down to 1.5. The evidence now【B6】______that within fifty years or so world population will【B7】______at about eight billion before starting a【B8】______rapid decline. That has really posed a great deal of anxiety.【B9】______, many people still fear that it will keep "exploding" until there are too many people for the earth to support.  But【B10】______.  World population was growing by two percent a year in the 1960s; the rate is now down to one percent a year, and【B11】______.This view is coming to be widely accepted among population experts, even as the public continues to focus on the threat of uncontrolled population growth.
【B2】
选项
答案greatly
解析 副词，用来修饰谓语动词change。从后文可以看出人们因为害怕人口爆炸都在控制人口，除非人们发生巨大转变，否则人口就会剧减。
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大学英语四级

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