题目内容

Ever walked to the shops only to find, once there, you’ve completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we’ve accepted that a forgetful brain is as much a part of ageing as wrinkles and grey hair.But now a new book suggests that we’ve got it all wrong.

According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age.In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s—much later than previously thought.

Furthermore, rather than losing many brain cells as we age, we retain them, and even produce new ones well into middle age.For years it’s been assumed that brain, much like the body, declines with age.But the longest, largest study into what happens to people as they age suggests otherwise.

This continuing research has followed 6,000 people since 1956, testing them every seven years.It has found that on average, participants performed better on cognitive(认知的) tests in their 40s and 50s than they had done in their 20s.Specifically, older people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving.

Where they performed less well was number ability and perceptual speed—how fast you can push a button when ordered.However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond.In short, researchers are now coming up with scientific proof that we do get wiser with age.

Neuroscientists are also finding that we are happier with ageing.A recent US study found older people were much better at controlling and balancing their emotions.It is thought that when we’re younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we’ve learned our lessons and are sub-consciously aware that we have less time left in life: therefore, it becomes more important for us to be happy.

1.Barbara Strauch probably agrees that ______.

A.the young are better at handling important things

B.people’s brains work best between their 40s and 60s

C.ageing leads to the decline of the function of the brain

D.wrinkles and grey hair are the only symbols of ageing

2.The continuing research has found older people perform better on _____ .

A.vocabulary tests

B.number ability

C.perceptual speed

D.body balance

3.People are happier with age because ______.

A.they learn to value the time left

B.they know how to share feelings

C.they cannot focus on negative aspects

D.they do not realize the possible dangers

4.What is the main idea of the passage?

A.People get wiser with age.

B.People get more forgetful with age.

C.People get happier with age.

D.People get more self-aware with age.

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What’s on Your Pet’s Mind?

In 1977, Irene Pepperberg of Harvard University began studying what was on another creature’s mind by talking to it. Her first experiments began with Alex. Alex was a one-year-old African grey parrot and Irene taught him to produce the sounds of the English language. “I thought if he learned to communicate, I could ask him questions about how he sees the world.”

At the time, most scientists didn’t believe animals had any thoughts. They thought animals were more like robots but didn’t have the ability to think or feel. Of course, if you own a pet you probably disagree. But it is the job of a scientist to prove this and nowadays more scientists accept that animals can think for themselves.

“That’s why I started my studies with Alex,” Irene said, “Some people actually called me crazy for trying this.”

Nowadays, we have more and more evidence that animals have all sorts of mental abilities. Sheep can recognize faces. Chimpanzees (黑猩猩) use a variety of tools and even use weapons to hunt. And Alex the parrot became a very good talker.

Thirty years after the Alex studies began. Irene was still giving him English lessons up until his recent death. For example, if Alex was hungry he could say “want grape”. Alex could count to six and was learning the sounds for seven and eight. “He has to hear the words over and over before he can correctly say them.” Irene said, after pronouncing “seven” for Alex a few times in a row. Alex could also tell the difference between colors, shapes, sizes, and materials (e.g. wood and metal). Before he finally died, Alex managed to say “seven”.

Another famous pet that proved some animals have greater mental skills was a dog called Rico. He appeared on a German TV game show in 2011. Rico knew the names of 200 different toys and easily learned the names of new ones. When Rico became famous, many other dog owners wanted to show how clever their pets were. Another dog called Betsy could understand 300 words.

One theory for dogs’ ability to learn a language is that they have been close companions to humans for many centuries and so their ability to understand us is constantly evolving (进化). While animals can’t do what humans do yet, some scientists believe that examples like Alex and Rico prove that evolution develops intelligence, as well as physical appearance.

1.Irene wanted to find out __________.

A. what a parrot thinks

B. why a parrot can speak

C. how parrots make sounds

D. if parrots speak English

2.Alex learnt new words by __________.

A. singing them

B. reading them

C. writing them

D. rehearing them

3.The two dogs mentioned in the article could _______.

A. understand some words

B. recognize strange voices

C. copy human gestures

D. tell different colors

4.The article concludes that ___________.

A. our pets understand what we say

B. dogs may speak to humans one day

C. humans are related to chimpanzees

D. mental ability can evolve in animals

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