1. (2018高二下·南京期末) 阅读理解

Cure for tiredness?

    Staying up late is a potential battle between parents and kids. But the solution could be as simple as changing your meal time.

    Researchers at the University of Surry, UK, found that delaying meals could help change one of the internal body clocks. Besides a “master” clock in the brain, there are clocks in other parts of the body. They are usually synchronized according to factors including light.

During the study, researchers tested 10 participants to examine the effect of changing meal times on their body clocks. The participants were given three meals —breakfast, lunch and dinner. In the first stage, participants received breakfast 30 minutes after waking. Lunch and dinner followed, after 5-hour intervals. In the second stage, each meal was delayed by 5 hours. Right after each stage, blood and fat samples were collected.

    Results showed that later meal times greatly influenced blood sugar levels. A 5-hour delay in meal times caused a 5-hour delay in the internal blood sugar rhythms.

    The discovery showed that meal times are in line with the body clock that controls blood sugar levels.

    This is a small study but the researchers believe the findings could help jet lag sufferers and night-shift workers.

    In a study by the University of Surrey in 2013, researchers explored what happened when a person's body was changed from a normal pattern to that of a night-shift worker's.

    After people work through the night, over 97 percent of the body's rhythmic genes are disrupted（扰乱，使混乱）.

    These findings explain why we feel so bad following a long flight, or after working at night, according to Simon Archer, one of the study's researchers.

    “It's like living in a house. There's a clock in every room in the house and in all of those rooms those clocks are now disrupted, which of course leads to chaos in the household,” fellow researcher DerkJan Dijk told the BBC.

Changing meal times didn't affect the “master” body clock — the one controlling when we get sleepy — but it can reset the body clock that controls blood sugar levels. This wouldn't necessarily cure jet lag completely, but it might reduce the negative effects.

A study published earlier this year suggested that just a weekend camping trip could be enough to reset our body clocks. And now this latest research shows regular food schedules could play a key part too.

1. （1） What did researchers at the University of Surrey find from their new study?

   A . Connections between the “master” clock and clocks in other parts of the body. B . Blood sugar levels are affected by when we eat rather than by our internal clocks. C . A delay in meal times causes an irregular change in blood sugar rhythms. D . Changing meal times can be enough to reset one of our body clocks.
3. （2） Which of the following statements is TRUE about the new study, according to the article?

   A . The interval between each meal being given was different. B . Blood and fat samples of the two groups of participants were collected. C . Each meal was served five hours later during the second stage. D . Participants were asked to report their feelings after each stage.
5. （3） What can we learn from the study by researchers at the University of Surrey from 2013?

   A . All our body's genes would be disrupted if we worked through the night. B . Our genes often become less active after a long flight or night of work. C . The disruption of one gene could lead to the disruption of other genes. D . A disruption to the body's rhythmic genes can cause people to feel bad.
7. （4） According to the article, ______.

   A . it's impossible to reduce the negative effects caused by jet lag or night work B . there is more than one way to reset body clocks C . the “master” body clock controls all the other body clocks D . a change in meal times can reset the “master” body clock