2. 外语
  3. Fifty years from now the world’s population will be declining, with no end in【B1】______Unless people’s values change【B2】______se

Fifty years from now the world’s population will be declining, with no end in【B1】______Unless people’s values change【B2】______se

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问题     Fifty years from now the world’s population will be declining, with no end in【B1】______Unless people’s values change【B2】______several centuries from now 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【B4】______when it reached the【B5】______rate--2.1 children per woman. In Italy, for example, the rate has fallen 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.【B9】______.
    many people still fear that it will keep "exploding" until there are too many people for the earth to sup- port. 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.
【B8】
选项
答案fairly
解析 副词，修饰rapid，表示“很快地”。
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