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¡¾ÌâÄ¿¡¿Mr. Black was the manager of a hotel in Atlanta. One weekend all of the hotels were full because of a large business meeting being held in the city. On Sunday night, three men came into Mr. Black¡¯s hotel and asked for rooms. Mr. Black told them that there were no more rooms available. The men didn¡¯t know what to do because they had no place to stay in.

Mr. Black wanted to help them. He remembered that there was an empty room at the far end of the first floor ¡ª Room 112. It was a very small room, and had rarely been used as a guest room before. So, he asked the three men if they would mind sharing that small room. They replied that they would be very satisfied so long as there was a room for them to stay in for the night.

Mr. Black then told them that the room would cost them $ 30 in total. On hearing this, each of the three men gave Mr. Black $ 10 before they left for their room.

However, Mr. Black soon began to think that $ 30 was really too much for that small room. He called his assistant over and said, ¡°Here is $ 5. Give it back to the three men in Room 112. Each of them paid me $10. That¡¯s too much.¡±

The assistant took the money. While he was on the way to that small room, he thought, ¡°How can three men divide $ 5? I¡¯ll give each of them only $ 1 and keep the $ 2 left to myself. The men will be happy to get anything back, and I can also make some money that way. After all, Mr. Black will never know anything about it.¡± So, the assistant returned only $1 to each of the three men.

Each man had first paid $ 10. After the assistant returned $1 to him, each man had actually paid only $ 9. There were three men. $ 9¡Á3=$27. The assistant kept $ 2. $ 27 + $ 2= $ 29. Where is the missing dollar?

¡¾1¡¿Why didn¡¯t Mr. Black offer Room 112 to the three men at first?

A. The key had been lost.

B. It was too small for three men.

C. No one had stayed there before.

D. It was not bright enough.

¡¾2¡¿How much did Mr. Black first ask each man for the room?

A. $ 30.B. $15. C. $10. D. $9.

¡¾3¡¿How were the manager and his assistant in behavior?

A. The manager was honest but the assistant was not.

B. The manager worked hard, but the assistant was lazy.

C. The assistant was clever but the manager was not.

D. The manager did not know how to make money, but the assistant did.

¡¾4¡¿Where is the missing dollar?

A. The three men took it.

B. The manager hid it secretly.

C. The assistant kept it.

D. There is no missing dollar.

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¡¾1¡¿B

¡¾2¡¿C

¡¾3¡¿A

¡¾4¡¿D

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¡¾ÌâÄ¿¡¿China news, Beijing, June 5 ¡ª The Horizon Research Group conducted a survey about Chinese parents and their children in May last year and this year. Based on a random sampling method, the survey, done in May last year, investigated about 1,095 people living in cities such as Beijing, Shanghai, Guangzhou, Xinjiang, Jinzhong, and Luzhou. All these people were aged between 18 and 60. The survey shows that 55.5% of the parents did not know who their children¡¯s best friends were. Fathers, in particular, knew even less about their children than mothers, as the survey shows only 33.8% of fathers knew who their children¡¯s best friends were while 50.8% of mothers did so, China Youth Daily reported.

Parents with little education were less concerned with their children¡¯s life, or whom their children played with. The survey shows that among parents that graduated from primary schools or without any educational background, only 33.1% knew who their children¡¯s best friends were. Among parents that had received middle school education, the related proportion reached 45.5%.

This year¡¯s survey was also based on random sampling. In May 2007, the Horizon Research Group investigated some 1,456 families in Beijing, Shanghai, Guangzhou, Wuhan, Changsha, Xi¡¯an, Chengdu and Harbin. The survey shows that children under the age of 12 play for less time with their playmates than their parents did when they were young.

The survey also shows that most children at present spend only 21.9% of their time playing with their friends, while their parents spent 36.8% of their time with their playmates when they were young. Nowadays, most children spend more time with their grandparents or babysitters than with their parents.

¡¾1¡¿The article tells us that the two surveys show the following aspects EXCEPT that ______.

A. parents at present spend less time playing with their children than with the older generation.

B. some parents do not know their children¡¯s best friends.

C. educated parents are more concerned about their children¡¯s life than those with little education.

D. parents at present are concerned little about their children¡¯s life.

¡¾2¡¿The passage can be found in _________.

A. a magazine B. a newspaper

C. a science journal D. a school book

¡¾3¡¿What can be inferred from the passage?

A. Parents need to take their responsibilities for their children.

B. Parents should provide better conditions for their children.

C. Parents don¡¯t play an important part in the growth of their children now.

D. Parents should let their children have more friends.

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Research on the human brain has been attracting the attention of more and more scientists in recent years. One of the latest research topics is how to change the human brain or combine the computer and the human brain, i.e., to transplant (ÒÆÖ²) a chip into human brain. This innovation (´´ÐÂ) may make everyone¡¯s dream come true. If we compare a human brain to a hard disc, what the scientists do is to enlarge the capacity (ÈÝÁ¿) of the hard disc. There are some difficulties in such transplant experiments, but scientists never give up.

Experiments were started on animals. In 1996, a transplant experiment performed at the Defense and Military Physiology Research Institute in the U.S. turned a bear into a dolphin.

The dolphin was named Ted, and the bear was named Tallin. Using the most advanced technology, deep and detailed studies were made of the swimming action memory area in Ted¡¯s brain by the scientists. They got a lot of useful information. The information was saved into a button-sized chip, which was then transplanted into the action memory area in Tallin¡¯s brain. The information saved on the chip was released by means of electric power.

Recently, another memory transplant was performed at the Motor Nerve Research Institute of the University of California. The transplant was performed from a dog named ¡°Genius¡± to a dog named ¡°Idiot¡±. ¡°Genius¡± could understand and follow up to 100 gestures and orders made by its master. It was a real genius. ¡°Idiot¡± was the younger brother of ¡°Genius¡±. It had no contact with people at all since its birth. It became an animal with nothing in its brain, without any memory.

The operation was a complete success. When the two dogs woke up, ¡°Idiot¡± had all the abilities ¡°Genius¡± possessed. It could follow every gesture and order given by its master. But ¡°Genius¡± gave no response to its master, and in fact did not recognize him at all.

¡¾1¡¿We can learn from the passage that _____.

A. the two experiments are about memory transplants

B. the scientists exchanged the dolphin¡¯s and the bear¡¯s brains

C. there is no possibility of changing the human brain

D. ¡°Idiot¡± got only some abilities ¡°Genius¡± possessed after the experiment

¡¾2¡¿The scientists did the two experiments to _____.

A. see if animals can be taught some special skills

B. see if animals can share some common knowledge

C. learn if it¡¯s safe to do such transplant experiments

D. make preparative research on changing the human brain

¡¾3¡¿The underlined sentence ¡°The operation was a complete success¡± in the last paragraph means that _____.

A. the dogs exchanged their memories

B. the dogs could live as before

C. the dogs were as clever as human beings

D. the dogs were safe

¡¾4¡¿It could be inferred from the passage that in the future _____.

A. human beings will be healthier

B. animals will be more tender

C. human beings may get knowledge more quickly

D. animals will cause more damage to the environment

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