An average of 3,000 letters a month by the newspaper's office. [ ] A．is received B．are received C．receives D．receive 题目和参考答案——青夏教育精英家教网—

题目内容

An average of 3,000 letters a month ________ by the newspaper's office.

[　　]

A．is received	B．are received
C．receives	D．receive

答案：B
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an average of...＋谓语(单数)，平均有……

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Gauri Nanda sees a wearable computer as a handbag—one that’s built out of four-inch squares and triangles of fiber, with tiny computer chips embedded(嵌入) in it. It looks, feels and weighs like your typical leather purse.

That’s where similarities end: This bag can wirelessly keep track of your belongings and remind you, just as you’re about to leave the house, to take your wallet. It can review the weather report and suggest that you grab an umbrella. This purse can even upload your favorite songs onto your scarf.

Sure, a computing purse and scarf set may seem like the stuff of science fiction. But these devices, part of next generation of wearable computers, could become commonplace within a few years. DuPont created new super strong fibers that can conduct electricity and can be woven into ordinary-looking clothes. And the chipmaker developed chip packaging allowing wearable computers to be washed, even in the heavy-duty cycle.

As a result, these new wearable devices are different from the heavy and downright silly versions of the recent past, which often required users to be wrapped in wires and type on their stomachs. Unlike their predecessors, these new wearable computers also make economic sense. When her bag becomes commercially available in two to three years, Nanda expects it will cost around $150, which is the price of an average leather purse.

Here’s how the bag works: You place a special radio-signal-transmitting chip on to your wallet. A similar radio in your purse picks up the signal and notifies you that you’ve forgotten to take your wallet. In turn, sensors on your purse’s handles will notify the computer that you’ve picked up the purse and are ready to go.

Already, these new kinds of wearable devices are being adopted for use in markets like auto repair, emergency services, medical monitoring—and even, increasingly, for consumers at large. Indeed, more people will want to cross that bridge in the coming years--- making for a booming market for wearable computers that don’t like something out of science fiction.

Which of the following describes a wearable computer?

A. It can be washed in a washing machine. B. It is much heavier than a leather purse.

C. It can download songs from the Internet. D. It is made of clothes conducting electricity.

According to the passage, these new wearable computers ______.

A. require users to operate on the stomach

B. pick up the signals through wires and chip

C. are being applied in some different areas now

D. are smarter but more expensive than the old ones

What does the underlined sentence in the last paragraph mean?

A. These new wearable computers have become fashionable.

B. People would like to learn more about these new computers.

C. These new wearable computers promise to sell well in the future.

D. The idea of these purse-like computers comes from science fiction.

The purpose of the passage is ______.

A. to introduce a new kind of computer B. to explain the function of computers

C. to compare different types of computers D. to show how high technology affects our life

阅读下面短文，简要回答问题。

One of the greatest things about growing older is that you get to stay up late. It’s not just your parents who that decision. Your body lets you enjoy dark hours, too.

Resent study has shown that brain changes during teen years make it easier for kids to stay up late. “But it doesn’t mean that you should stay up late just because you can stay up late,” scientists say. Young people who don’t get enough sleep are often late for school, or they miss it completely. And their grades go down. “If you’re sleeping in school, you’re not learning,” says Mary Carskadon who is a sleep researcher.

Lack of sleep is a growing problem in the United States. Schools have been starting earlier in recent years. And with TV, computers, and video games attracting them, people of all ages are sleeping less than their parents or their grandparents did.

Sleep is important because it gives our bodies time to recover from the stress (压力) of living. Studies show that the adults (成人) who sleep less than 6 hours a night have mote heart problems and die sooner than the adults who sleep 7 to 8 hours a night.

How much sleep do you need? It depends mainly on your age. Babies often sleep for the most of the day. By the time they’re 10 years old, kids need an average of 10 hours a night. As they get older, kids have signs to sleep less. But given the chance in an experiment to sleep as long as they want to, young teenagers have 10 hours of sleep. There are even some indications that teenagers may need more sleep than younger kids.

Find in the passage a word closest in meaning to the underlined word “indications”.（在文章中找一个与indications意义相近的词）

_______________________________________.

What is the main cause of young teenagers’ staying up late? (回答字数不超过8个)

_________________________________________________________________.

Why is sleep so important? (回答字数不超过13个)

________________________________________________________________.

What can be the best way to ensure the sleeping time of the school children in the USA according to the passage? (回答字数不超过6个)

__________________________________________________________________.

We’ve used the wind as an energy source for a long time．

The Babylonians and Chinese were using wind power to

pump water for irrigating crops 4,000 years ago, and sailing

boats were around long before that．Wind power was used in the

Middle Ages, in Europe, to grind（磨碎） corn, which is where

the term “windmill” comes from．

We can use the energy in the wind by building a tall tower, with a large propellor（螺旋桨） on the top．The wind blows the propellor round, which turns a generator to produce electricity．We tend to build many of these towers together, to make a “wind farm” and produce more electricity．The more towers, the more wind, and the larger the propellors, the more electricity we can make．It's only worth building wind farms in places that have strong, steady winds, although boats and caravans（大篷车）increasingly have small wind generators to help keep their batteries charged．

The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains — places where the wind is strong and reliable．Some are offshore．To be worthwhile, you need an average wind speed of around 25 km/h．Most wind farms in the UK are in Cornwall or Wales．Isolated places such as farms may have their own wind generators．In California, several “wind farms” supply electricity to homes around Los Angeles．

The propellors are large, to obtain energy from the largest possible volume of air．The blades can be angled to cope with varying wind speeds．Some designs use vertical turbines （垂直涡轮机）, which don’t need to be turned to face the wind．The towers are tall, to get the propellors as high as possible, up to where the wind is stronger．This means that the land beneath can still be used for farming．

1．The first paragraph aims to introduce to us _______．

A．the function of wind power B．the source of wind power

C．the nations using wind power D．the history of using wind power

2．The best places for building the wind farm are places where _______．

A．boats and caravans can often be seen B．isolated farms don’t have enough electricity

C．there are less human activities D．the wind is strong and reliable

3．We can infer from the passage that _______．

A．wind farms will not take up too much farming land

B．wind farms need no fuel because wind is free

C．the blades can be angled to turn to face the wind wherever it comes from

D．the higher and larger the towers are, the stronger the wind is

4．What can be a suitable title for the passage?

A．Where to build a wind farm． B．ABC of the using of wind energy．

C．How to make best use of wind． D．Wind energy is the best energy．

To get an extra 14 years of life, don’t smoke, eat lots of fruits and vegetables, exercise regularly and drink alcohol in a proper amount．That is according to a study published this Monday in the Public Library of Science Medicine Journal．

After tracking more than 20,000 people aged 45-79 years in the United Kingdom from about 1993-2007, Kay-Tee, Khaw of the University of Cambridge and his colleagues found that people who adopted these four healthy habits lived an average of 14 years longer than those who didn’t．

“We’ve known for a long time that these behaviors are good things to do, but we’ve not seen this benefit before, ” said Susan Jebb, head of Nutrition and Health at Britain’s Medical Research Council．“The benefit was also seen regardless of whether or not people were fat and what social class they came from．”

Study participants(参与者) scored a point each for not smoking, regular physical activity, eating five servings of fruits and vegetables a day and moderate alcohol intake．

Public health experts said they hoped the study would inspire governments to introduce policies helping people to adopt these changes．But because the study only observed people rather than testing specific changes, it would be impossible to conclude that people who suddenly adopted these healthy behaviours would surely gain 14 years．

“We can’t say that any person could gain 14 years by doing these things,” said Doctor Tim Armstrong, a physical activity expert at the World Health Organization．”The 14 years is an average across the population of what’s theoretically(理论上) possible．”

“Most people know that things like a good diet matter and that smoking is not good for them”, Susan Jebb said, ”We need to work on providing people with much more practical support to help them change．”

1．Which of the following doesn’t belong to the four healthy habits?

A．Eating five servings of fruits and vegetables a day．

B．Doing proper exercise in the morning every day．

C．Having a cigarette before going to bed every day．

D．Drinking alcohol in the proper amount every day．

2．We can learn from the passage that_____．

A．the study observed people as well as tested specific changes

B．Susan Jebb did not take part in the study

C．there is no need for people under 45 adopt these good habits

D．only those from first class can benefit from these healthy behaviours

3．What can be inferred from the passage?

A．Governments should take measures to help people change their bad habits．

B．People aged 45-79 have bad habits in the United Kingdom．

C．All the people are well aware of the harm of their bad habits．

D．People have adopted the four healthy habits after knowing they’re good．

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

A．Smoking and Drinking Cuts You 14 Years

B．Healthy Habits Could Gain You Extra 14 years

C．A New Way of Keeping Healthy

D．Smoking and Drinking Harms Your Health

阅读表达（共5小题；每小题3分，满分15分）

阅读下面的短文，并根据短文后的要求答题。（请注意问题后的词数要求）

〔1〕Too much TV-watching can harm children’s ability to learn and even reduce their chances of getting a college degree, new studies suggest in the latest effort to examine the effects of television on children．

〔2〕One of the studies looked at nearly 400 northern California third-graders．Those with TVs in their bedrooms scored about eight points lower on math and language arts tests than children without bedrooms TVs．

〔3〕A second study, looking at nearly 1,000 grown-ups in New Zealand, found lower education levels among 26-year-olds who had watched lots of TV during childhood．But the results don’t prove that TV is the cause and don’t rule out that already poorly motivated youngsters（年轻人）may watch lots of TV．

〔4〕Their study measured the TV habits of 26-year-olds between ages 5 and 15．Those with college degrees had watched an average of less than two hours of TV per weeknight during childhood,___________ more than 2½ hours for those who had no education beyond high school．

〔5〕In the California study, children with TVs in their rooms but no computer at home scored the lowest, while those with no bedroom TV but who had home computers scored the highest．

〔6〕While this study does not prove that bedroom TV sets caused the lower scores, it adds to accumulating findings that children shouldn’t have TVs in their bedrooms．

1.What would be the best title for this text?

_______________________________________________________________________．

2.Which sentence in the text is closest in meaning to the following one?

Without the accurate proof , bedroom TV sets may be to blame for the reason for lower scores, besides．

__________________________________________________________________________．

3.Fill in the blank in Paragraph 4 with proper words．（ no more than 8 words）

__________________________________________________________________________．

4.What information can we get from these studies?（within 15 words）

__________________________________________________________________________．

5.Translate the underlined sentence in Paragraph 3 into Chinese．

__________________________________________________________________________

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