[单项选择]

A very important world problem--in fact, I think it may be most important of all the great world problems which face us at the present time--is the rapidly increasing pressure of population on the land.
The population of the world today is about 4, 000, 000, 000. That is an enormous number, yet it is known quite accurately, because there are very few parts of the world which have not carried out a modern census.
The important thing is not so much the actual population of twenty million--about six months’ increase in world population. Take Australia. There are ten million people in Australia. So it takes the world about three months to add to itself a population which peoples that vast country. Let us take our own crowded country, England and Wales--forty-five to fifty million people. This is just about a year’s supply.
By this time tomorrow, and every day, there will be added to the earth about 120. 000 extra people--just about the population o
A. has a population of twenty million
B. is a vast country that needs a bigger population
C. constitutes one-fourth of the world’s population increase every year
D. has a population that happens to be one-fourth of the yearly world increase

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