2. 外语
  3. The need for birth control methods has developed fairly recently, with the desire among many women to be able to【B1】_____when th

The need for birth control methods has developed fairly recently, with the desire among many women to be able to【B1】_____when th

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问题     The need for birth control methods has developed fairly recently, with the desire among many women to be able to【B1】_____when they want to have a baby. At the same time there is a growing【B2】_____of the problem of a rapidly increasing world population.
    This problem of a rising world population is largely the result of improved medical skills, which have 【B3】_____the death rate and at the same time raised the birth rate by increasing live births and the number of babies who survives early childhood. There is a growing realization that food production cannot【B4】_____ these increases, the result of which is that in some countries people are already starving to death while many millions more【B5】_____malnutrition. This problem is further complicated by the fact that in places like America and Europe we obtain by trade and consume far more food and resources like oil than the average Indian, thus【B6】_____even less for the people in the underdeveloped areas to survive on.
    World population is rising【B7】_____two percent a year: this means an addition of 70 million people a year to the present population of more than 3 500 million. There are【B8】_____regional differences in the population growth trends. Latin America【B9】_____first place in the fastest growing regions, which includes South and Central America and the Caribbean, while Africa and Asia closely follow Latin America. However, the largest absolute addition to the world population is in Asia which at present【B10】_____about three-fifths of the people of the world.
【B3】
选项
答案decreased
解析 根据空格所在位置可知，空格处应填入动词(词组)。结合录音可填入decreased，意为“降低”。
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