The Pacific island nation of Nauru used to be a beautiful place.Now it is an ecological disaster area.Nauru's heartbreaking story could have one good consequence-other countries might learn from its mistakes.
For thousands of years,Polynesian people lived in the remote island of Nauru,far from western civilization.The first European to arrive was John Fearn in 1798.He was the British captain of the Hunter, a whaling ship.He called the island Pleasant Island.
However, because it was very remote, Nauru had little communication with Europeans at first.The whaling ships and other traders began to visit,bringing guns and alcohol.These elements destroyed the social balance of the twelve family groups on the island.A ten-year civil war started,which reduced the population from 1,400 to 900.
Nauru's real troubles began in 1899 when a British mining company discovered phosphate(磷酸盐)on the island.In fact,it found that the island of Nauru was nearly all phosphate,which was a very important fertilizer for farming.The company began mining the phosphate.
A phosphate mine is not a hole in the ground;it is a strip mine.When a company strip-mines,it removes the to player of soil.Then it takes away the material it wants.Strip mining totally destroys the land.Gradually, the lovely island or Nauru started to look like the moon.
In 1968,Nauru became one of the richest countries in the world.Every year the government received millions and millions of dollars for its phosphate.
Unfortunately, the leaders invested the money unwisely and lost millions of dollars.In addition,they used millions more dollars for personal expenses.Soon people realized that they had a terrible problem—their phosphate was running out.Ninety percent of their island was destroyed and they had nothing.By 2000,Nauru was financially ruined.Experts say that it would take approximately$433,600,000 and more than 20 years to repair the island.This will probably never happen.
1.What might be the author's purpose in writing the text?
A.To seek help for Nauru's problems. |
B.To tell a heartbreaking story of a war. |
C.To show the importance of money |
D.To give a warning to other countries |
2.What was Nauru like before the Europeans came?
APeaceful and attractive B.Modern and open
C.Rich and powerful D.Greedy and aggressive
3.The ecological disaster in Nauru resulted from
A.soil pollution |
B.phosphate overmining |
C.farming activity |
D.whale hunting |
4.Which of the following was a cause of Nauru's financial problem?
A.Its phosphate mining cost much money |
B.It spent too much repairing the island |
C.Its leaders misused the money |
D.It lost millions of dollars in the civil war. |
5.What can we learn about Nauru from me last paragraph?
A.The leaders will take the experts' words seriously |
B.The ecological damage is difficult to repair. |
C.The island was abandoned by the Nauruans |
D.The phosphate mines were destroyed |
Like distance runners on a measured course,all of us will move through time in a roughly predictable pattern.
In the first stage of our lives,we develop and grow, reaching toward the top of physical vitality(活力).
After we grow up,however, the body begins a process of gradually wearing out.
A new awareness of physical fitness may help lengthen our years of health and vitality,yet nothing we do will work to stop the unavoidable force of aging.
Most of the changes of aging take place deep inside the body.The lungs become less able to take in oxygen.Powerful muscles gradually lose their strength.The heart loses power and pumps less blood.Bones grow easier to break.
Finally, we meet a stress,a stress that is greater than our physical resistance.Often,it is only a minor accident or chance infection(a disease caused by virus),but this time,it brings life to an end.
In 1932,a classic experiment nearly doubled the lifetime of rats,simply by cutting back the calories in their diet The reason for the effect was then unknown.
Today, at the University of California at Berkley, Dr.Paul Seagle has also greatly lengthened the normal lifetime of rats.The result was achieved through a special protein limited diet,which had a great effect on the chemistry of the brain.Seagle showed that within the brain,specific chemicals control many of the signals that influence aging.By changing that chemical balance,the clock of aging can be reset.
For the first time, the mystery of why we age is being seriously challenged.Scientists in many fields are now making striking and far-reaching discoveries.
An average lifetime lasts 75 years,yet in each of us lies a potential for a longer life.If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
1.What does the underlined word “it” refer to?
A.Physical vitality. |
B.Stress. |
C.Aging. |
D.Physical resistance. |
2.Which of the following is not a change of aging?
A.People gradually lose their muscle strength. |
B.Bones tend to break more easily. |
C.The heart loses power and pumps less blood. |
D.The lungs become unable to take in oxygen. |
3.The author believes the following except that .
A.human's life pattern is predictable |
B.physical fitness can't stop the force of aging |
C.human's lifetime will last longer than 75 years |
D.all of the changes of aging take place deep inside the body |
4.How did Dr.Paul Seagle lengthen the lifetime of rats in his experiment?
A.By keeping their physical fitness. |
B.By cutting the calories in their diet. |
C.By resetting their clock of aging. |
D.By limiting the protein in their diet. |
5.What is probably the best title for the article?
A.Two Great Experiments |
B.The Mystery of Human Life |
C.The Breakthrough in the Study of Aging |
D.Ways to lengthen Human Life |
. I'd really appreciate ________ if you would turn off the lights before you leave.
A.you |
B.that |
C.as |
D.it |
It never _____ humans until the mid1990s that some animals can be cloned.
A.occur |
B.is occurred |
C.occurred to |
D.occurred |
If you _____ his wife’s income____ his own,the total of their income _____ 3000 yuan.
A.add; to; will add up to |
B.add; to; adds to |
C.add up; to; adds up to |
D.will add; for; adds up |
Is it a wonder that ____little cells can store much energy?
A.so; so |
B.so; such |
C.such; such |
D.such; so |