Can’t we just live in today, the worries of tomorrow or the regrets of the past? A. free from B. aware of C. sure of D. tired from 题目和参考答案——青夏教育精英家教网—

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Can’t we just live in today, ________ the worries of tomorrow or the regrets of the past?

A. free from B. aware of C. sure of D. tired from

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Mere is an astonishing and significant fact: Mental work alone can’t make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue (疲劳).To the amazement of these scientists, they discovered that blood passing through the brain, when it is active，shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins (毒素）and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?

Some scientists declare that most of our fatigue comes from our mental and emotional (情感的）attitudes. One of England’s most outstanding scientists, J. A. Hadfield，says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”

What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored， anger, anxiety, tenseness, worry, a feeling of not being appreciated - those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.

64. What surprised the scientists a few years ago?

A. Fatigue toxins could hardly be found in a laborer’s blood.

B. Albert Einstein didn’t feel worn out after a day’s work.

C. The brain could work for many hours without fatigue.

D. A mental worker’s blood was filled with fatigue toxins.

65. According to the author, which of the following can make sitting workers tired?

A. Challenging mental work.

B. Unpleasant emotions.

C. Endless tasks.

D. Physical labor.

66. What's the author’s attitude towards the scientists’ ideas?

A. He agrees with them.

B. He doubts them.

C. He argues against them.

D. He hesitates to accept them.

67. We can infer from the passage that in order to stay energetic, sitting workers need to _____ .

A. have some good food

B. enjoy their work

C. exercise regularly

D. discover fatigue toxins

On Saturday nights, A.J.Coston doesn’t get a lot of sleep. Usually three or four times a night, a loud bell rings, a red light flashes, and he has to jump out of his bed. That’s because he’s a weekend volunteer firefighter（消防员）with Loudoun County Fire and Rescue Station 13 in Northern Virginia. During the week, he lives at home with his mom, dad and sister and does his main job which is going to high school.
“I have always wanted to get into firefighting since I was a little kid watching fire trucks go by,” he says. “One day on the Internet I noticed that Loudoun County offered a junior firefighter program.” He was only 16, but he got it.
Fighting fires is dangerous work. Firefighters never stop practicing the skills they need to stay safe. Once Coston learned those skills, he was allowed to work inside burning buildings.
“Teamwork is most important,” he says. “It’s the whole team that puts the fire out.”
Firefighters feel great about helping people. “My most unbelievable call was probably the time four kids were struck by lightning,” says Coston. He will be off to college next fall, building on his dream job. “I’ll get my degree in emergency（紧急情况） medical care. and then work in a fire and rescue company for a while. I want to be a flight doctor on a helicopter in the end, but I will never forget the days as a firefighter. These are my unforgettable experiences,” he says.
【小题1】 Coston can’t sleep well on Saturday nights because _____.

A．he has to work part-time at weekends

B．he has some sleeping problems

C．he has to do his job as a volunteer firefighter

D．he alway

s worries that there may be a fire

【小题2】What do we learn about Coston from the passage?

A．He doesn’t like studying at school.	B．He will go to college next year.
C．He dreams to be a great hero one day.	D．He is only sixteen years old.

【小题3】In Coston’s opinion, what is the key thing in putting out a fire?

【小题4】All of the following are true EXPECT that _____.

A．Coston wanted to be a firefighter when he was a kid

B．Coston tried several times before he became a volunteer firefighter

C．firefighters feel proud that they can help people

D．firefig

hters have to practice skills all the time to stay safe

Here is an astonishing and signficant fact:Mental work alone can’t make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human could labor without reaching a stage of fatigue(疲劳). To the amazement of these scientists, they discovered thett blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day labourer, we could find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of Albert Einstein, it would show no fatigue toxing at the end of the day.

So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours f efforts as at the beginning. The brain is totally tireless. So what makes us tired.

Some scientists declare that most of our fatigue come from our mental and emotional(情感的) attitudes. One of England’s most outstanding scientists. J. A. Hadfield,says,“The greater part of the fatigue from which we suffer is of mental origin. In fact,fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares,“One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”

What kinds of emotions make sitting workers tired?Joy?Satifaction?No!A feeling of being bored,anger,anxiety,tenseness,worry,a feeling of nt being appreciated---those are emotions that tire sitting workers.Hard work by itself seldom causes fatigue.We get tired because our emotions produce nervousness in the body.

1.What surprised the scientists a few years ago?

A．Fatigue toxinscould hardly be found in a labour’s blood.

B．Albert Eistein didn’t feel worn out after a day’s work.

C．The brain could wrk for many hours without fatigue.

D．A mental worker’s blood was filled with fatigue toxins.

2.According to the authour,which of the following can make sitting worker tired？

A．Challenge mental work.

B．Unpleasant emotions.

C．Endless tasks.

D．Physical labor.

3.What’s the authour’s attitude towards the scientists’ ideas?

A．He agrees with them.

B．He doubts them

C．He argues against them.

D．He hesitates to accept them.

4.We can infer from the passage that in order to stay energic, sitting workers need to ______.

A．have some good blood

B．enjoy their work

C．exercise regularly

D．discover fatigue toxin

Who is your role model? Normally the answer to this question would be anyone around you who you find truly inspiring. It could also be someone like J. K. Rowling or Martin Luther King Jr. who have proven to be strong and intelligent people.

However, in today's world, stars are regarded as role models along with the heroes listed above, despite their intentions or actions. Teens attempt to imitate their actions for two major reasons. First, to be fashionable and accepted by popular culture, and second» because stars' actions are so well documented by the media that it seems to grab our attention and turns it to following stars' lives. Much of the reports about stars is shocking and exhibits bad morals or lifestyles that aren't right for teenagers. In addition, almost everything stars do is described beyond truth to make a shocking story by taking it to the next level.

However, teens must take responsibility for their actions. We can't always blame stars for influencing us. Only you have control over yourself and only you choose to do something. Our bodies and actions are in the hands of no one else.

Now, who ever said stars are role models? Whether they choose to be or not, stars set examples as soon as they step into the spotlight. With reporters following and recording every move they make, it is impossible not to be watched and then be imitated. These people influence, teens whether or not they want to. Why should someone who doesn't want to be setting an example set one? So，should we look up to them or to people who are true and good role models? It's our responsibility as teens to know right from wrong, and it's time for us to take responsibility for our actions. In doing so ，we will lean toward those inspiring people that want to be setting an example, and follow in their steps to be like them.

1.According to the first paragraph, _____can usually be role models.

A. political leaders

B. wealthy writers

C. people inspiring others

D. people with great intelligence

2.What are the major reasons for the teens to imitate stars? _____.

A. Interest in stars' life and expectation of getting rich

B. Motivation for being fashionable and inspiration from popular examples

C. Intentions to gain acceptance and encouragement from stars' lifestyle

D. Desires to be stylish and great influence from the mass media

3.The author writes the passage mainly to advise the teenagers to_____.

A. have a control over their own bodies and actions

B. be responsible for their own choices and behaviors

C. follow fashionable stars' steps to be more popular

D. choose right role models according to different reports

4.It can be inferred from the passage that .

A. stars have the responsibility for teenagers' actions

B. not all famous stars choose to influence teenagers

C. teenagers choose those inspiring people as their role models

D. stars set examples immediately they stepped into the spotlight

Directions; Complete the following passage by using the words in the box．Each word can only be used once Note that there is one word more than you need．

A．actually B．suddenly C．impact D．fitness E．memories

F．imaging G．responsible H．implications I．boost J．encouraging

If you want to 1._ your child's results at school, you could do a lot worse than ensuring that they do plenty of exercise．Scientists have already shown that physical activity can make you cleverer．A team in America has used scans to show that an important part of the brain _2._ grows in children who are fit．These youngsters tend to be more intelligent and have better _3._ than those who are inactive．

Scientists also found that one of the most important parts of their brains was 12 per cent larger than those of unfit youngsters．They believe that _4._ children to take exercise from a very young age could help them do better at school later．Researchers from the University of Illinois, in the U．S．, studied the brains of 49 children aged nine and ten using a magnetic resonance _5._ scan, a technique which provides very detailed pictures of organs and tissues in the body．

They also tested the _6._ levels of the children by making them run on a treadmill．The scientists found that the hippocampus（海马体）, a part of the brain _7._ for memory and learning, was around 12 per cent larger in the fitter youngsters．

Professor Art Kramer, who led the study published in the journal Brain Research, said the findings had important _8._ for encouraging individuals to take part in sport from a young age．"We knew that experience and environmental factors and socioeconomic status all _9._ brain development," he said．"If you get some lousy（坏的） genes from your parents, you can't really fix that, and it's not easy to do something about your economic status．But here's something that we can do something about．

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