Directions: Read the following passage and choose the most suitable heading from A—F for each paragraph. There is one extra heading which you do not need．       
A．The results explained why time passes quickly when we are dealing with more tasks
B．Time flies when you are having fun and drags when you are bored．
C．Volunteers were told to finish three different tasks in the study．
D．There are areas of the brain having the function of estimating time．
E．Concentrating on time passing is probably a more accurate perception of reality
F．Focusing on' the duration or the color the of image makes trips speed．
【小题1】
Scans have shown that patterns of activity in the brain change depending on how we focus on a task． Concentrating on time passing, as we do when bored, will trigger brain activity which will make it seem as though the clock is ticking more slowly．
【小题2】
In the study, 12 volunteers watched an image while researchers monitored their brain activity using MRI scans．Volunteers were given a variety of tasks．In one they were told to concentrate simply on the duration of an image, in another they were asked to focus on the color, and in a third they were asked to concentrate on both duration and color．
【小题3】
The results showed that a network of brain regions was activated when more subjects were paid attention to duration．It is thought that if the brain is busy focusing on many aspects of a task, then it has to spread its resources thinly, and pays less heed（注意） to time passing．Therefore, time passes without us really noticing it, and seems to go quickly．
【小题4】
However, if the brain is not stimulated in this way, it concentrates its full energies on monitoring the passing of time．This may make time seem to drag, but in fact the researchers found that the more volunteers concentrated on the duration of the images, the more accurate were their estimates of its duration．
【小题5】
Lead researcher Dr Jennifer Coull said many of the areas of the brain involved in estimating time were the same that played a key role in controlling movement, and preparing for action．She said this overlap suggests that the brain may make sense of time as intervals between movements, in much the same way as a musician marks time with his foot, or an athlete anticipates the sound of a starter's pistol（手枪）．

An experimental solar-powered plane landed safely Thursday after completing its first 24-hour test flight, proving that the aircraft can collect enough energy from the sun during the day to stay aloft(在空中) all night.

         Pilot Andre Borschberg eased the Solar Impulse onto the runway at Payerne airfield about 30 miles southwest of the Swiss capital Bern at exactly 9 a.m. (3 a.m. EDT) Thursday. Helpers rushed to stabilize the pioneering plane as it touched down, ensuring that its massive 207-foot wingspan didn't scrape the ground and topple(倾倒) the craft.

         The record feat(壮举) completes seven years of planning and brings the Swiss-led project one step closer to its goal of circling the globe using only energy from the sun. ‘We achieved more than we wanted. Everybody is extremely happy,’ Borschberg told reporters after landing.

         Previous flights included a brief ‘flea hop’ and a longer airborne test earlier this year, but this week's attempt was described as a ‘milestone’ by the team. The team said it had now demonstrated that the single-seat plane can theoretically stay in the air indefinitely, recharging its depleted batteries using 12,000 solar cells and nothing but the rays of the sun during the day. But while the team said this proves that emissions-free air travel is possible, it doesn't see solar technology replacing conventional jet propulsion(喷气推进) any time soon. Instead, the project's overarching purpose is to test and promote new energy-efficient technologies.

         Project co-founder Bertrand Piccard, himself a record-breaking balloonist, said many people had been skeptical that renewable energy could ever be used to take a man into the air and keep him there. ‘It’s a matter of time that people come to believe and understand about renewable energies,’Piccard said, adding that the flight was proof that new technologies can help break society's dependence on fossil fuels.

         The team will now set its sights on an Atlantic crossing, before attempting a round-the-world flight in 2013, making only five stops along the way. ‘It's absolutely not time to relax,’ said Piccard.

Title: A 1. __________ in solar-powered flight and its background information

The market is a concept. If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the local manager of the supermarket. But in either case, you are producing for the market. Your efforts are being directed by the market. If people stop buying tomatoes, you will stop producing them.
If you take care of a sick person to earn money, you are producing for the market. If your father is a steel worker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.
When you spend your income, you are buying things from the market. You may spend money in stores, supermarkets, gas stations and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.
The market may be something abstract (抽象的). But for each person or business that is making and selling something, it is very concrete. If nobody buys your tomatoes, it won’t be long before you get the message. The market is telling you something. It is telling you that you are using energies and resources in doing something the market doesn’t want you to do.
【小题1】 Which of the following would be the best title of the passage?

At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were        to show that we all have “a body clock”         us, which controls the        and fall of our body energies,        us different from one day to the next.

The        of “a body clock” should not be too        since the lives of most living things are controlled        the 24 hour night-and-day cycle. We feel        and fall asleep at night and become        and energetic during the day. If the 24 hour-cycle is        , most people experience unpleasant        . For example, people who are not        to working at night can find that        of sleep causes them to        badly at work.

       the daily cycle of sleeping and       , we also have other cycles which       longer than one day. Most of us would        that we feel good on some days and not so good on         ; sometimes our ideas seem to flow and at other times, they        do not exist.

1.A．anxious    B．able    C．careful               D．proud

2.A．inside       B．around        C．between           D．on

3.A．movement        B．supply          C．use                D．rise

4.A．showing   B．treating       C．making               D．changing

5.A．invention B．opinion        C．story             D．idea

6.A．difficult    B．exciting       C．surprising          D．interesting

7.A．from         B．by        C．over         D．during

8.A．dull         B．tired C．dreamy        D．peaceful

9.A．regular     B．excited        C．lively        D．clear

10.A．disturbed       B．shortened   C．reset        D．troubled

11.A．moments        B．feelings       C．senses              D．effects

12.A．prevented      B．allowed       C．expected    D．used

13.A．miss       B．none   C．lack          D．need

14.A．perform          B．show   C．manage            D．control

15.A．With       B．As well as    C．Except              D．Rather than

16.A．working         B．moving        C．living        D．waking

17.A．repeat   B．remain         C．last           D．happen

18.A．agree     B．believe        C．realize              D．allow

19.A．other     B．the other    C．all other           D．others

20.A．just         B．only    C．still           D．yet

An experimental solar-powered plane landed safely Thursday after completing its first 24-hour test flight, proving that the aircraft can collect enough energy from the sun during the day to stay aloft(在空中) all night.

       Pilot Andre Borschberg eased the Solar Impulse onto the runway at Payerne airfield about 30 miles southwest of the Swiss capital Bern at exactly 9 a.m. (3 a.m. EDT) Thursday. Helpers rushed to stabilize the pioneering plane as it touched down, ensuring that its massive 207-foot wingspan didn't scrape the ground and topple(倾倒) the craft.

       The record feat(壮举) completes seven years of planning and brings the Swiss-led project one step closer to its goal of circling the globe using only energy from the sun. ‘We achieved more than we wanted. Everybody is extremely happy,’ Borschberg told reporters after landing.

       Previous flights included a brief ‘flea hop’ and a longer airborne test earlier this year, but this week's attempt was described as a ‘milestone’ by the team. The team said it had now demonstrated that the single-seat plane can theoretically stay in the air indefinitely, recharging its depleted batteries using 12,000 solar cells and nothing but the rays of the sun during the day. But while the team said this proves that emissions-free air travel is possible, it doesn't see solar technology replacing conventional jet propulsion(喷气推进) any time soon. Instead, the project's overarching purpose is to test and promote new energy-efficient technologies.

       Project co-founder Bertrand Piccard, himself a record-breaking balloonist, said many people had been skeptical that renewable energy could ever be used to take a man into the air and keep him there. ‘It’s a matter of time that people come to believe and understand about renewable energies,’Piccard said, adding that the flight was proof that new technologies can help break society's dependence on fossil fuels.

       The team will now set its sights on an Atlantic crossing, before attempting a round-the-world flight in 2013, making only five stops along the way. ‘It's absolutely not time to relax,’ said Piccard.

Title: A __________ in solar-powered flight and its background information