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The food we eat seems to have profound effects on our health. Although
science has made enormous steps in making food more fit to eat, it has , atthe
same time, made many foods unfit to eat. Some research has shown that perhaps
eighty percent of cancer is related to the diet as well, especially cancer the
colon . Different cultures are more prone to contract certain illnesses because
of the food that is characteristic in these cultures. That food related to
llness is not a new discovery. In 1945 , government researchers realized that
itrates and nitrites, commonly used to preserve color in meats, and other food
dditives, caused cancer. Yet, these carcinogenic additives remain in our food,
nd it becomes more difficult all the time to know which things on the pack ging
labels of processed food are helpful or harmful.The additives which we eat are
not all so direct. Farmers often give penicillin to beef and poultry, and
because of this, penicillin has been found in the milk of treated cows.
Sometimes similar drugs are administered to animals not for medicinal purposes,
but for financial reasons. The farmers are simply trying to fatten the animals
in order to obtain a higher price on the market. Although the Food and Drug
Administration (FDA) has tried repeatedly to controlthese procedures, the
practices continue.
48. What is the main topic of the passage?
A. Food and our health
B Food and additives
C. Food and cancer
D Food and culture
49 All of the following statements are true EXCEPT_______.
A Forty percent of cancer is caused by problems related to food.
B Researchers have known about the potential danger of food additivesfor many
years
C. We eat some of the food additives directly and some indirectly
D Drugs are always given to animals for medicinal purposes
50. Why do farmers give drugs to their animals?
A. to speed up the growth of animals
B To make theanimals fatter
C to make the animals ’ meat fit to eat
D To make the animals’ meat rich in nutrients
51. It can be inferred from the passage that_________.
A scientist have made all the food fit to eat
B only in recent years have people found that the food is related to one’s
illness
C all kinds of cancer are related to the diet
D some additives are harmful to our health
52. The word “ this ”in the second sentence of paragraph 2 most
probablyrefers to __________.
A farmer
B penicillin
C beef and poultry
D the fact that farmers often give penicillin to a beef
We can begin our discussion of “population as global issue” with what most persons mean when they discuss “the population problem”: too many people on earth and a too rapid increase in the number added each year. The facts are not in dispute, It was quite right to employ the analogy that likened demographic growth to “a long, thin powder fuse that burns steadily and haltingly until it finally reaches the charge and explodes.”
To understand the current situation, which is characterized by rapid increases in population, it is necessary to understand the history of population trends. Rapid growth is a comparatively recent phenomenon. Looking back at the 8,000 years of demographic history, we find that populations have been virtually stable or growing very slightly for most of human history. For most of our ancestors, life was hard, often nasty, and very short. There was high fertility
in most places, but this was usually balanced by high mortality. For most of human history, it was seldom the case that one in ten persons would live past forty, while infancy and childhood were especially risky periods. Often, societies were in clear danger of extinction 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 8,000 BC.till approximately AD. 1650. In the first period of some 9600 years, the population increased from some 8
million to 500 million in 1650. Between 1650 and the present, the population has increased from 500 million to more than 4 billion. And it is estimated that by the year 2000 there will be 6.2 billion people throughout the world. One way to
appreciate this dramatic difference in such abstract numbers is to reduce the time frame to something that is more manageable. Between 8000BC and 1650, an average of only 50,000 persons was being added annually to the world’s population each year. At present, this number is added every six hours. The increase is about 80,000,000 persons annually.
1.Which of the following demographic growth pattern 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 exceeds birthrates and then a short period
with higher fertility and lower mortality.
2.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.
3.Which statement is true about population increase?
A.There might be an increase of 2.2 billion persons from now to the year
2000.
B.About 50,000 babies are born every six hours at present.
C.Between 8000 BC and the present, the population increase is about
80,000,000 persons each year.
D.The population increased faster between 8000BC and 1650 than between 1650
and the present.
4.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.
5.The word “demographic” in the first paragraph means___.
A.statistics of human.
B.surroundings study.
C.accumulation of human.
D.development of human.
Passage 4
Questions 16 to 20 are based on the following passage:
I recently wrote an autobiography in which I recalled many old memories. One
of them was from my school days, when our ninth grade teacher, Miss Raber, would
pick out words from the Reader’s Digest to test our vocabulary.
Today, more than 45 years later, I always check out “It pays to Enrich Your
Word Power” first when the Digest comes each month. I am impressed with that
idea, word power. Reader’s Digest knows the power that words have to move
people—to entertain, inform, and inspire. The Digest editors know that the big
word isn’t always the best word. Take just one example, a Quotable Quote form
the February 1985 issue: ”Time is a playful thing. It slips quickly and drinks
the day like a bowl of milk.”
Nineteen words, only two of them more than one syllable, yet how much they
convey! That’s usually how it is with Reader’s Digest. Small and simple can be
profound.
As chairman of a foundation to restore the Statue of Liberty, I’ve been
making a lot of speeches lately. I try to keep them fairly short. I use small
but vivid words: words like “hope”, “guts”, “faith”, “dreams”. Those are words
that move people and say so much about the spirit of America.
Don’t get me wrong. I’m not against using big words, when it is right to do
so, but I have also learned that a small word can work a small miracle—if it’s
right word, in the right place, at the right time. It’s a “secret” that I hope
never forget.
16. The passage is mainly about .
A. one of the many old memories
B. using simple words to express profound ideas
C. Reader’s Digest and school speeches
D. how to make effective speeches
17. It seems that Reader’s Digest is a magazine popular with .
A. people of all ages B. teenagers C. school teachers D. elderly readers
18. The example the author gives in the second paragraph might mean .
A. one spends his day playing and drinking
B. don’t waste your time as one does
C. time slips easily if you don’t make good use of it
D. time is just like drinking milk from a bowl
19. The author’s “secret” is .
A. to avoid using big words at any time
B. to use words that have the power to move people
C. to work a miracle by using a small word
D. to use small and simple words where possible
20. Accoeding to the author, well-chosen words can give people .
A. hope, courage and ideas
B. confidence, determination and strength
C. pleasure, knowledge and encourage
D. entertainment, information and power
Questions 16 to 20 are based on the following passage:
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