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As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? （）
A . The data is moving from 10BASE-TX to 100BASE-TX.
B . The WAN encapsulation type has changed.
C . The data format has changed from analog to digital.
D . The source and destination hosts are in the same subnet.
E . The source and destination MAC addresses have changed.
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It happened（）a winter night.
A . at
B . in
C . by
D . o
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As a frame leaves a Layer 3 device，the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen？（）
A . The data is moving from 10BASE-TX to 100BASE-TX.
B . The WAN encapsulation type has changed.
C . The data format has changed from analog to digital.
D . The source and destination hosts are in the same subnet.
E . The source and destination MAC addresses have changed.
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A man escaped from the prison last night. It was a long time_____the guards discovered what had happened.
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Since it was produced, The Last Night of Ballyhoo has gotten a great reputation and it was performed in ______ during the Olympic Games.
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In winter, some people energy by lowing the heat at night.
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Since it was produced, The Last Night of Ballyhoohas gotten a great reputation and then was performed in Atlanta during the Olympic Games.（）
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听力原文：W: I just made up a quart of orange juice this morning, and now I can't find it anywhere. Do you know what happened to it？
M: Did you hear a crash earlier？ That was it. I'm just as clumsy as ever.
Q: What is tile problem？
(17)
A．The woman doesn't like orange juice.
B．The woman didn't come to see Everett.
C．The man was in a car crash this morning.
D．The man broke the container of juice.
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Most young people enjoy some form. of physical activity. It may be walking, cycling or swimming, in winter, or skating or skiing. It may be a game of some kind -- football, hockey, golf or tennis. It may be mountaineering.
These who have a passion【C1】______climbing high and difficult mountains are often【C2】______with astonishment. Why are men and women【C3】______to suffer cold and hardship, and to【C4】______on high mountains？ This astonishment is caused, probably, by the difference between mountaineering and other forms of activity【C5】______which men give their leisure.
Mountaineering is a sport and not a game. There are no man-made rules, as there are for【C6】______games as golf and football. There are, of course, rules of different kinds which it would be dangerous to【C7】______, but it is this freedom from man-made rules【C8】______makes mountaineering attractive to many people. Those who climb mountains are free to use their own【C9】______.
If we【C10】______mountaineering with other more familiar sports, we might think that one big difference is【C11】______mountaineering is not a" team work". We should be mistaken in this. There are it is true , no" matches"【C12】______"teams" of climbers, but when climbers are on a rock face linked by a rope on which their lives may【C13】______, there is obviously teamwork.
A mountain climber knows that he may have to fight forces that are stronger and more powerful than man. He has to fight【C14】______of nature. His sport requires high mental and【C15】______qualities.
A mountain climber【C16】______to improve in skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions【C17】______in their early twenties. But it is not【C18】______for men of fifty or sixty to climb the highest mountains in the Alps. They may take more【C19】______than younger men, but they probably climb with more skill and less【C20】______of effort, and they certainly experience equal enjoyment.
【C1】
A．for
B．in
C．to
D．of
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It was an empty hut, but at least it offered us a______for the night.
A．roof
B．shelter
C．rescue
D．screen
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听力原文：M: There was a new quiz show on television last night, but we were just sitting down to dinner when it came on.
W: I watched it and it was great! The first four contestants won only small prizes, but the fifth left with a new luxury car.
Q: What happened last night？
(16)
A．Four contestants failed to win prizes.
B．The man ate during the show.
C．The woman missed the show.
D．Five contestants won cars.
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听力原文：M: You must be Kelly. Thanks for coming. It's hard to find a good baby-sitter on a Friday night.
W: I like watching kids, and I need the extra money. I'd like to talk to you about my new rate increases.
What does the woman mean？
A．She is asking for a higher pay.
B．She is introducing a new friend.
C．She is too busy.
D．She's got some problems.
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It was because his bike struck last night ______he didn't pay me a visit.
A．that
B．when
C．why
D．so that
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听力原文：I tell you you'll be playing with fire if you go alone into that neighborhood at night. It's a place where almost anything can happen to you if you don't watch out.
What does the speaker say about that neighborhood？
A．One should be very careful when entering into that dangerous neighborhood.
B．That neighborhood is a mess with many construction works underway.
C．Almost everything can be bought within that neighborhood.
D．That neighborhood caught a fire one night recently.
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It______last night______Anne had a severe heart attack.
A．is; when
B．was; when
C．was; in which
D．was; that
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I&39;m in a position to think about my future and plan it a little more rather than just waiting for what happens．
A.used to
B.unwilling to
C.able to
D.glad to
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What happens to a female elephant when it dies？
A．The others take a little of its corpse away.
B．The others eat its dead body.
C．The others bury it near their home.
D．The others leave its dead body there.
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In winter, there is a lot of ________ and it is _______ every day.
A．snowy, snow
B．snow, snowy
C．snow, snow
D．snowy, snowy
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It' s a______state of affairs when you can' t go out at night for______of being attacked.
A．sad; afraid
B．sad; fear
C．sadly; afraid
D．sadly; fear
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There was a big fire last night , but it was ______in time .T
A．put off
B．put on
C．put away
D．put out
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A full night's sleep'/Not everyone needs it. The truism that all adults need at least eight hours of sleep a night for good health should be put to rest by mounting evidence that less may be better.①
People who sleep about seven hours a night live the longest, three huge studies have found, the newest out in the February issue of the journal Sleep. Still, many sleep experts say lots of adults get too little rest, and that can lead to dangerous health problems.
In the latest report from Japanese researchers, 104,010 adults were followed for about 10 years. At the start the participants answered questionnaires about their sleep patterns and about their health mental health and lifestyle. habits, which also can affect survival. After accounting for all of these factors, adults getting all average of seven hours had the lowest death rates. Surprisingly, less sleep ,even as little as four hours a night, didn't significantly increase deaths for men and only lowered survival for women if they averagde less than four hours② But adults who slept longer than seven hours, particulary women, were more likely to die during the 10 years.
Two other major published studies and a dozen smaller ones came to similar conclusions, says psychiatrist Daniel Kripke, a sleep researcher at the University of California-San Diego School of Medicine. Doctors shouldn't tell all of their patients to get at least eight hours of sleep, he says in an editorial in the journal. Hormonal changes triggered by darkness or other unknown biological effects from long sleep could be affecting survival,③ Kripke，says.
But short sleepers may suffer other bad effects. In his brief studies, those sleeping four to five and a half hours did poorly on tests that measure memory, clear thinking and the ability to pay attention, "and they did progressively worse as the week went on," says David Dinges of the University of Pennsylvania School of Medicine. Adults who slept about seven hours performed best, he says. Other small studies have found adults who sleep less than six hours may be at higher risk for some diseases like diabetes and overweight. And sleep deprivation also causes car crashes, Dinges says. "People should get as many hours sleep, p as they need to feel rested," Kripke says, adding that there's no proof that shortening sleep will lengthen life. s1eep need is partly genetic and may be determined by other factors that also influence life span, he says.
What can we learn from the passage？
A．Sleep hours is the most important factor affecting survival.
B．Going to bed and getting up early improve health.
C．Less sleep is more harmful than over sufficient sleep to people.
D．People have different demands of sleep hours.
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听力原文：M: It's the mildest day in this winter. Do you want to go for a bike ride after the class？
W: When could we start at the latest？ Today's last class is an experiment class and it often runs late.
Q: What do we learn about the woman from the conversation？
(18)
A．She might be late for her experiment class.
B．She doesn't have a bike.
C．She might be delayed by her last class.
D．She might be late for her experiment class.
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I didn't know what to her last night.
A was happenedB happeningC happenedD was happen
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A pervasive Internet coupled with the right mobile technology could make it happen. （Para. 5）（）
A．connected
B．matched
C．welcomed
D．None of the above
