tinction because death rates could exceed their birthrates. Thus, the population problem throughout most of history was how to prevent extinction of the human race.

　　This pattern is important to notice. Not only does it put the current problems of demographic growth into a historical perspective, but it suggests that the cause of rapid increase in population in recent years is not a sudden enthusiasm for more children, but an improvement in the conditions that traditionally have caused high mortality.

　　Demographic history can be divided into two major periods: a time of long, slow growth which extended from about 8000 B.C. till approximately 1650 A.D. In the first period of some 9,600 years, the population increased from some 8million to 500 million in 1650. Between 1650 and 1975, the population has increased from 500 million to more than 4 billion. And the population reached 6.2 billion throughout the world by the year 2000. One way to appreciate this dramatic difference in such abstract numbers is to reduce the time frame to something that is more manageable. Between 8000 B.C. and 1650, an average of only 50,000 persons was being added annually to the world's population. At present, this number is added every six hours. The increase is about 80,000,000 persons annually.

　　57. The word "demographic" (Line 4, Para. 1) means ________.

　　[A] statistics of human

　　[B] surroundings study

　　[C] accumulation of human

　　[D] development of human

　　58. Which of the following demographic growth patterns is most suitable for the long thin powder fuse analogy?

　　[A] A virtually stable or slightly decreasing period and then a sudden explosion of population.

　　[B] A slow growth for a long time and then a period of rapid, dramatic increase.

　　[C] Too many people on earth and a few rapid increase in the number added each year.

　　[D] A long period when death rates exceed birthrates and then a short period with higher

　　fertility and lower mortality.

　　59. During the first period of demographic history, societies were often in danger of extinction because ________.

　　[A] only one in ten persons could live past 40

　　[B] there was higher mortality than fertility in most places

　　[C] it was too dangerous to have babies due to the poor conditions

　　[D] our ancestors had little enthusiasm for more children

　　60. Which statement is TRUE about population increase?

　　[A] There might be an increase of 2.2 billion persons from 1975 to the year 2000.

　　[B] About 50,000 babies are born annually at present.

　　[C] Between 8000 B.C. and the present, the population increase is about 80,000,000 persons　each year.

　　[D] The population increased faster between 8000 B.C. and 1650 than between 1650 and the　present.

　　61. The author of the passage intends to ________.

　　[A] warn people against the population explosion in the near future

　　[B] compare the demographic growth pattern in the past with that after 1650

　　[C] find out the cause for rapid increase in population in recent years

　　[D] present us a clear and complete picture of the demographic growth

　　Part V Error Correction (15 minutes)

　　Directions: This part consists of a short passage. In this passage, there are altogether 10 mistakes, one in each numbered line. You may have to change a word, add a word or delete a word. Mark out the mistakes and put the corrections in the blanks provided. If you change a word, cross it out and write the correct word in the corresponding blank. If you add a word, put an insertion mark (∧) in the right place and write the missing word in the blank. If you delete a word, cross it out and put a slash (/) in the blank.

　　Example:

　　Television is rapidly becoming the literature of our periods. 1. time/times/period

　　Many of the arguments having used for the study of literature 2.______________

　　as a school subject are valid for ∧ study of television. 3.______________

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