It's not unusual for a person to help someone else but without getting anything in return. But
英语试题 02-03
It's not unusual for a person to help someone else but without getting anything in return. But this behavior is thought to be rare among animals. Up to now, that kind of behavior hasn't been seen in birds. So scientists at the Max Planck Institute for Ornithology created an experiment to test whether African grey parrots could behave that way.
The first step in the experiment was to teach the parrots how to trade “token （筹码）" for food. The tokens were small metal rings about the size of coins. When the parrots gave these tokens back to the researchers, the parrots were given walnuts, which they enjoyed.
Once the parrots knew how to trade tokens for walnuts, the scientists began the next part of the experiment. Two parrots were put in clear plastic cages next to each other, with a connecting window between the two cages. There was a feeding window in both cages, which allowed the scientists to give walnuts to the parrots. Then the feeding window was closed for one of the parrots that had been given ten tokens.
The results showed that most of the time, the parrot that couldn't trade for walnuts would pass a token, back-to-back, to the bird in the next cage that could then trade it for a walnut. The parrots that passed the tokens got nothing. They simply watched as the other parrots got food. Still, seven out of the eight parrots tested passed the tokens over and over again. And it wasn't because they liked passing tokens. If the parrot with the tokens saw that their partner's feeding window was also closed, they rarely passed tokens.
The scientists believe that helping others may be useful to the parrots in the wild, where they live in large groups that change often. I he scientists think that helping others could give a parrot a good “reputation （名声）” and make it more likely that the parrot will get help from the group when it needs it.
27. What would the scientists do if they were given back the token?
A. Give the token to another parrot.
B. Give the parrot's partner a walnut.
C. Give the parrot some food as a reward.
D. Give the parrot some coins to play with.
28. The parrots pass tokens to others because.
A. they were trained to do that
B. they liked playing with tokens
C. they hoped their partners got food
D. they expected something in return
29. What do we learn about African grey parrots?
A. They dislike living in large groups.
B. They can benefit from helping others.
C. They often receive help from other birds.
D. They have a very good reputation in Africa.
30. In the passage, the writer wants to show.
A. parrots quickly learn to share things
B. parrots seem to be happy to help others
C. parrots love playing games with each other
D. parrots and humans have something in common
答案
27-30 CCBB
The first step in the experiment was to teach the parrots how to trade “token （筹码）" for food. The tokens were small metal rings about the size of coins. When the parrots gave these tokens back to the researchers, the parrots were given walnuts, which they enjoyed.
Once the parrots knew how to trade tokens for walnuts, the scientists began the next part of the experiment. Two parrots were put in clear plastic cages next to each other, with a connecting window between the two cages. There was a feeding window in both cages, which allowed the scientists to give walnuts to the parrots. Then the feeding window was closed for one of the parrots that had been given ten tokens.
The results showed that most of the time, the parrot that couldn't trade for walnuts would pass a token, back-to-back, to the bird in the next cage that could then trade it for a walnut. The parrots that passed the tokens got nothing. They simply watched as the other parrots got food. Still, seven out of the eight parrots tested passed the tokens over and over again. And it wasn't because they liked passing tokens. If the parrot with the tokens saw that their partner's feeding window was also closed, they rarely passed tokens.
The scientists believe that helping others may be useful to the parrots in the wild, where they live in large groups that change often. I he scientists think that helping others could give a parrot a good “reputation （名声）” and make it more likely that the parrot will get help from the group when it needs it.
27. What would the scientists do if they were given back the token?
A. Give the token to another parrot.
B. Give the parrot's partner a walnut.
C. Give the parrot some food as a reward.
D. Give the parrot some coins to play with.
28. The parrots pass tokens to others because.
A. they were trained to do that
B. they liked playing with tokens
C. they hoped their partners got food
D. they expected something in return
29. What do we learn about African grey parrots?
A. They dislike living in large groups.
B. They can benefit from helping others.
C. They often receive help from other birds.
D. They have a very good reputation in Africa.
30. In the passage, the writer wants to show.
A. parrots quickly learn to share things
B. parrots seem to be happy to help others
C. parrots love playing games with each other
D. parrots and humans have something in common
答案
27-30 CCBB
苏19057182-3号