Two scientists in California now think they can find out a person’s real age.Jeffery Bada and Patricia Masters do chemical tests on teeth.When we are born the amino acids（氨基酸）in our teeth are in one form.Then，as we grow older these amino acids change into a second form.Every year，one thousandth of the amino acids changed.So，by testing just one tooth and counting the number of amino acids in each form，Bada and Masters can work out a person’s age.They tested a tooth from the body of an Eskimo（爱斯基摩人）woman who died 1 600 years ago.From the appearance of her body，she was between 50 and 60 years old when she died.The tooth test put her age at 53.Then the Russian Government sent them a tooth from an old man in Georgia.The tooth said she was 99.Her real age was 96.The Russians are now hoping to send more teeth，from the very old people without birth certificates（出生证明书）.But there are problems.Some of the centenarians（百岁老人）have lost all their teeth.The others want to keep their teeth until they drop out naturally.So the Russian Government and the American scientists have to wait and hope.
61.Jeffery Bada and Patricia Masters believe that they can tell a person’s age according to_______.
A.an experiment on his bone
B.the shape and condition of his teeth
C.a test on the amino acids within his body
D.the changing form of amino acids in his teeth
62.According to the passage，which of the following statements is true?
A.The amino acids in an adult’s teeth may differ from those in a baby’s.
B.The number of amino acids in a 20-year-old man is different from that when he was seven.
C.Amino acids in one teeth changes without affecting their forms.
D.Scientists no
w can tell how long a person will live by testing his teeth.
63.Why are the two scientists asked to find out some very old Russians’ age?
A.Because the Government wants to know how long these old people can live.
B.Because they have no birth certificates.
C.Be
cause people who have tooth problems tend to live longer.
D.Because the Government wants to know their dates of birth and death.
64.In order to find out the exact age of some people over 100，both the Russian Government and American scientists_______.
A.should wait until all of them die
B.should pull out one of their teeth
C.have to wait for their teeth to drop out naturally
D.want to have their teeth pulled out
65.The central idea of the passage is_______.
A.the relationship between people’s teeth and ages
B.the relationship between amino acids and teeth
C.the contradiction（矛盾）between scientists and patients
D.the contradiction between the Government and the scientists
At first all films were in black and white, but in 1932 the first color film was made. It proved as unpopular as making films had done in the late 1920’s. It was not until 1938 that a full length color film was made, and the success of this film made producers(制片人) everywhere change from black and white to color. This first full-length color film was translated （翻译）into ten different languages and made Hollywood（好莱坞）the main center（ 中心）of film industry(电影业)
In the early days of the cinema, other countries had also film industries. Very good films were made in Sweden, Britain, Russia and France. However, because Holleywood had so much money to spend, it kept its position as the world’s most important film center. Film actors went to America because they knew they could get a lot of money for every film they made. In 1918 Charlie Chaplin （查理·卓别林）received $5 each day.
However, life was not always easy for the film actors. Newspapermen followed them everywhere, and after Charlie Chapine married for the fourth time he became so unpopular with the American public that he had to leave the country and live in Europe.. Which of the following is correct?
| A．People liked the color film as soon as it was made. |
| B．At first making films were not popular. |
| C．Color films were at first silence. |
| D．Talking films were all color films. |
.. The first full-length color film was made ___________
| A．in Holleywood | B．in Sweden | C．by Charlie Chapine | D．in Britain |
. Many film actors went to America because ___________
| A．America was the only country that made good films. |
| B．no other countries had film industries |
| C．they could make a lot of money there |
| D．they wanted to become famous actors |
.. Life was sometimes difficult for actors because ______________
| A．films often cost huge amount of money to make |
| B．they had to leave their countries |
| C．sometimes films lose money |
| D．they could not get away from newspapermen |
When many people are worried that there are no more heroes(英雄) in the modern society（当今社会） ,two university（大学） students who lost their lives to rescue（营救）drowning(溺水的)children have shown that heroes still exist（存在）.
According to（根据） the Inner Mongolia Morning Post（内蒙古晨报）, the tragedy（悲剧）occurred on the afternoon of December 14,2002 when three school students skating on a frozen (结冰的) lake in Qingcheng Park in Hohhot（呼和浩特）fell through the ice into the freezing water.
More than 20 university students who happen to be near the spot（地点） immediately went to the rescue of the children,
Two children were quickly rescued, but the third died. The child’s body was not found for three hours. Two of the rescuers, Liu Ye and Hao Longbiao ,also died of cold and exhaustion(筋疲力尽).
The body of Hao who took the lead（ 带领）in jumping into the lake was not found until the next day.A student who was unwilling to tell his name said he and his classmates from the local college were taking photos at the lake. When they heard the children’s cries for help,, they went to the ice hole hand in hand (手拉手)to rescue the children. But the ice kept breaking, causing most of then to fall into the icy water,
Local residents(居民) held mourning ceremonies(祭奠仪式)at the lake.
Eight of the students were seriously affected by the freezing water and were being kept in hospital for further observation（进一步观察）, but their lives were no longer in danger.. The underlined word “occurred” here means
| A．employed | B．mixed | C．guided | D．happened |
.. When the three school students fell into water, the university students were
| A．skating on the ice | B．taking photos at the lake |
| C．having a picnic | D．walking along the lake |
.Which of the following is TRUE according to the passage?
| A．Three students died on the same day in all. |
| B．Hao Longbiao’s body was found on December 14,2002. |
| C．The university students didn’t think it dangerous to save the drowning children in the lake. |
| D．Local residents were not brave in face of danger. |
. It can be inferred（推知） that ______________
| A．people think little of （对----评价低）the two university students’ death |
| B．the ice on the lake wasn’t strong enough to skate on |
| C．some students regrets（后悔） for what they had done |
| D．heroes don’t agree with（与-----一致） the steps（步调） of modern times |
Ellen Parker was worried about her health. She could not walk very quickly and it was difficult for her to climb stairs（爬楼梯）. She was soon out of breath.（气喘吁吁）
“I think I had better go to the doctor, ” she thought.
She went to the doctor and told him her problem.
“I’m not at all surprised, ”he said. “It’s obvious （明显的）what your problem is.”
He examined her and then gave her some advice.“If you don’t do what I say, Mrs. Parker,” he said. “You will have a heart attack（心脏病）. It could kill you.”
Ellen was very worried as she left the doctor’s. She knew that she had to take his advice but that would not be easy and it would take time.
The next day she went shopping. The first shop she went into was a butcher’s shop（肉店）.
“I’d like ten pounds of steak (大块肉片), please,” she said.
“Certainly, madam,” the butcher(屠夫) answered and went into the cold room and found a large piece of steak. He brought the huge piece of meat back into the shop and placed it on the scale(秤).
“That’s just ten pounds,” he said.
“That’s big enough,” Mrs. Parker said.
The butcher worked out(计算) the price.
“At $ 4.99 a pound that will be $ 49.90, please. Would you like me to cut it into small pieces for you?”
“Oh, I don’t want to buy the meat,” Mrs. Parker said.
“If you don’t want to buy it,” the butcher said angrily, “Why did you ask me to get it for you?”
“My doctor told me that I am overweight (超重的)and have to lose ten pounds. I wanted to see what ten pounds of flesh looked liked.”. Why did Ellen Parker visit the doctor?
| A．She had a heart attack. | B．She had a problem with her health. |
| C．She was unhappy about her weight. | D．She could not sleep well. |
. Why did she ask for ten pounds of steak?
| A．she wanted to buy some for dinner. | B．She wanted to lose weight |
| C．Her doctor had told her to eat steak. | |
| D．She wanted to see what ten pounds of meat looked like. |
.. What was her real problem?
| A．She ate too much steak. | B．She weighed too much. |
| C．The doctor didn’t know. | D．She could not walk very quickly. |
. What did the doctor think might happen to Ellen?
| A．she might put more on weight. | B．She might stop eating too much. |
| C．She might have a heart attack. | D．She might go to another doctor. |
Mr. King lived with six hundred wild（野生）animals on the Greek Island of Kyklos. Ever since he left school, he had traveled all over the word collecting animals for his own zoo. He hoped to collect（收集） two examples of every kind of animal on his island（岛屿）. But he was afraid that people would find him someday.
He wrote books about his travels and about his animals that he collected. The money from the books helped to pay for all the food that these animals ate.
One day, when Mr. King was out looking for drinking water, he found oil（石油）. He needed money for his travels and for his zoo, and a little oil would buy enough water for what he needed all his life, but he knew that if he told anyone else about it, it would be the end of his zoo and his life’s work. So he decided not to tell anyone else about what he had found, because oil and water couldn’t mix.. . Mr. King traveled all over the world for collecting ______.
| A．oil | B．water | C．animals | D．money |
. . Mr. King was afraid that people would find him someday because ________.
| A．he hadn’t got enough money for them | B．that would be the end of his zoo |
| C．he hadn’t got enough water and oil | D．they would buy his animals |
. . Mr. King wrote books to _______.
| A．tell people about his story | B．tell people how to find oil |
| C．get enough money for his animals | D．make money for his travels |
. . In the passage, “oil and water couldn’t mix” means that “_________”.
| A．Mr. King needed not only water but also oil |
| B．oil and water were rather difficult to be mixed together |
| C．Mr. King’s animals only needed water, not oil |
| D．if he told the others he found oil, his life’s work would be stopped |
On a small farm in Mexico, there are no schools. A bus is the school! The driver of the bus is the teacher! It is a school bus, but it doesn't take children to school. It just goes round from place to place, and sometimes it comes to this farm. The bus will stay here for three months. The farmers call it a school on wheels (车轮).
Every time the bus comes, the farmers come running to it, shouting and laughing. They warmly welcome the school bus!
When the bus is on the farm, in the morning, the teacher teaches the small children. In the afternoon, the bigger children come to have their lessons because they must work in the morning. At night, the fathers and mothers come to school. They want to learn, too. How the farmers hope that some day they can have a real(真正的) school on their farm! . . The driver of the bus is ________.
| A．the teacher | B．the student | C．the farmer | D．the school |
.The bus school will ________.
| A．take children to school | B．stay there for lunch |
| C．take the fathers and mothers to school | D．go round from place to place |
. . When the school bus comes, the farmers are ________.
| A．sad | B．angry | C．be happy | D．disappointed(失望) |
. . Which one of the following is true?
| A．A school bus is a real school for farmers' children. |
| B．The bus school has no teacher at all. |
| C．The bus school has no students. |
| D．The children and their parents on the farm all come to the bus school to learn. |