It is easy for us to tell our friends from our enemies. But can other animals do the same? Elephants can! They can use their sense of vision and smell to tell the difference between people who pose a threat and those who do not.

In Kenya, researchers found that elephants react differently to clothing worn by men of the Maasai and Kamba ethnic groups. Young Maasai men spear animals and thus pose a threat to elephants; Kamba men are mainly farmers and are not a danger to elephants.

In an experiment conducted by animal scientists, elephants were first presented with clean clothing or clothing that had been worn for five days by either a Maasai or a Kamba man. When the elephants detected the smell of clothing worn by a Maasai man, they moved away from the smell faster and took longer to relax than when they detected the smells of either clothing worn by Kamba men or clothing that had not been worn at all.

Garment color also plays a role, though in a different way. In the same study, when the elephants saw red clothing not worn before, they reacted angrily, as red is typically worn by Maasai men. Rather than running away as they did with the smell, the elephants acted aggressively toward the red clothing.

The researchers believe that the elephants’ emotional reactions are due to their different interpretations of the smells and the sights. Smelling a potential danger means that a threat is nearby and the best thing to do is run away and hide. Seeing a potential threat without its smell means that risk is low. Therefore, instead of showing fear and running away, the elephants express their anger and become aggressive.

71. According to the passage, which of the following statements is true about Kamba and Maasai people?

A. Maasai people are a threat to elephants.  

B. Kamba people raise elephants for farming.

C. Both Kamba and Maasai people are elephant hunters.

D. Both Kamba and Maasai people traditionally wear red clothing.

72. How did the elephants react to smell in the study?

A. They attacked a man with the smell of new clothing.

B. They needed time to relax when smelling something unfamiliar.

C. They became anxious when they smelled Kamba-scented clothing.

D. They were frightened and ran away when they smelled their enemies.

73. What is the main idea of this passage?

A. Elephants use sight and smell to detect danger.

B. Elephants attack people who wear red clothing.

C. Scientists are now able to control elephants’ emotions. 

D. Some Kenyan tribes understand elephants’ emotions very well.

74. What can be inferred about the elephant’s behavior from this passage?

A. Elephants learn from their experiences.

B. Elephants have sharper sense of smell than sight.

C. Elephants are more intelligent than other animals.

D. Elephants tend to attack rather than escape when in danger.

The Eiffel Tower was built in 1889, in memory of the 100th birthday of the French Revolution. The Prince of Wales, later King Edward VII of England, opened the tower. Of the 700 suggestions that were handed in, Gustave Eiffel’s was chosen.

However, at first, it was not well accepted by all and a group of people — including many well-known writers and painters at that time — were fiercely against its design.

Being about 300 meters in height, and 7,000 tons in weight, it was the world’s tallest building until 1930. It was a great project for France. 300 workers took two years to build it. It isn’t an ordinary building, since it is almost made of steel. For example, its body moves around at most 12 cm in heavy wind. Moreover, its height changes up to 15 cm according to the temperature.

It was almost destroyed in 1909, but was saved because of its antenna(天线), which is used for communication at that time. Beginning in 1910 it became part of the International Time Service. French radio and French television have also made good use of its height.

The Eiffel Tower has also seen a few strange things. In 1923, a journalist rode a bicycle down from the first level of it. And in 1954, a mountain climber climbed on top of it and tried to measure its exact height.

Anyway, although its birth was difficult, it is now well accepted all over the world. It has been considered as one of the symbols of Paris.

44. The passage mainly tells us ________.  

A. the history of the Eiffel Tower

B. some information about its design

C. what the Eiffel Tower was used for

D. how it became one of the symbols of Paris

45. Which of the following statements is TRUE according to this passage?

A. Many people couldn’t accept the Eiffel Tower at the beginning.

B. It was the world’s tallest building for hundreds of years.

C.A journalist rode down from the Eiffel Tower in 1954.

D.The Eiffel Tower was saved because of its height.

46. The French Revolution took place in _______.

A. 1889    B. 1923     C. 1789     D. 1930

As an English saying goes, “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter really can improve people’s health.
Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, makes the heart beat quicker and makes people breathe deeper; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.
Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated (忍耐) the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain.
As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.
【小题1】Which of the following statements is NOT true according to the passage?  

As an English saying goes, “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter really can improve people’s health.

Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, makes the heart beat quicker and makes people breathe deeper; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.

Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated (忍耐) the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain.

As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

1.Which of the following statements is NOT true according to the passage?  

A．Laughter can make people breathe deeper

B．Laughter can make you become old quickly.

C．Laughter helps to reduce pain.

D．Laughter, just like physical exercise, is good for our body.

2.The underlined word “diminishes” in the third paragraph means “_________”.  

A．delays            B．prevents          C．increases          D．reduces

3.Why do doctors hold laughter clinics? 

A．Because they want to earn more money.

B．Because they think they will help the patients recover from illnesses.

C．Because they want to improve their patients’ health.

D．Because they want their patients to laugh more.

4.According to the author, we should __________ in our life. 

A．laugh as much as possible                 B．watch more funny films

C．smile all the time                        D．spend time in the laughter clinics

5.What would be the best title for this passage?  

A．Both laughter and physical exercise are good for health.

B．Laughter clinics can help patients improve their condition.

C．Laughter can reduce the effect of pain.

D．Laughter is the best medicine.

There is an English saying that “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter can really improve people’s health.
Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, makes the heart beat quicker and makes people breathe deeper; it also works on several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.
Other tests have shown that laughter appears to be able to reduce the effects of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated（忍耐）the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain.
As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.
【小题1】According to the passage, the following statements are true except       .