Man can go on increasing his numbers at

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问题 Man can go on increasing his numbers at the present rate. In the next 30 years man will face a period of crisis. Some experts believe that there will be a widespread food shortage. Other experts think that this is too pessimistic, and that man can prevent things from getting worse than they are now. But remember that two-thirds of the people in the world are undernourished or starving now.  One thing that man can do is to limit the number of babies born. The need for this is obvious, but it is not easy to achieve. People have to be persuaded to limit their families. In the countries of the population explosion, many people like big families. The parents think that this brings a bigger income for the family and ensures there will be someone in the family who will look after them in old age.  Several governments have adopted birth control policies in recent years. Among them are Japan, China, India and Egypt. In some cases the results have not been successful. Japan has been an exception. The Japanese adopted a birth control policy in 1948. People were encouraged to limit their families. The birth rate fell from 34.3 per thousand per year to about 17 per year at present.The “population”explosion can be explained like this: _____.(  )A. A lot of childrenB. more peopleC. over populationD. great and sudden increase in population

选项 A. A lot of children
B. more people
C. over population
D. great and sudden increase in population

答案 D

解析 从上下文可以看出“population explosion”表示“人口爆炸;人口激增”。
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