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    A that引导同位语从句.在从句中无意义.也不作句子成分,which引导定语从句应作句子成分.引导名词性从句表示“哪一个 ,用until意义不通.用if则应为if Bill recovers from.... 【查看更多】

     

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    Was it during the Second World War_____ he died?　　　　　　　

    A．that　　　　

    B．while　　

    C．in which　　　

    D．then

     

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    阅读理解

    A Train Floating On Air

    　　A train that floats on air? It's not magic－it's magnets(磁)．And it's close to reality．

    　　In Virginia USA the fall of 2002, a train with no wheels traveled on air and carried college students across their campus．In Japan, a whisper-quiet railway engine hovered and raced at 350 miles per hour using magnets and electricity as the power．And in China, a magnet train line linked Shanghai with nearby Pudong Airport．

    　　These trains use magnetic levitation(悬浮)technology, “maglev” for short．They use the same rules as the magnets you pick up at home or school：opposite poles of magnets attract each other, and like poles repel each other．

    　　How does it work?

    　　Powerful magnets on the bottom of train repel magnets on the track, which is actually just a magnet-filled guiding way．With a magnetic field of sufficient force, the train will go hovering on air, which seemed impossible to us in the past．

    　　When an electrical current is sent through the track, the train moves．Turn the current backwards and the train slows down．

    　　Maglev doesn't rely on the friction(摩擦力)of wheels on track, so it can climb a much steeper hill than a traditional train．And it can travel easily in snow and ice, something that could bring normal trains to a screaming stop．

    (1)

    This passage is about ________．

    [　　]

    A．

    maglev

    B．

    magnets

    C．

    levitation

    D．

    electricity

    (2)

    Which of the following is a repelling action?

    [　　]

    A．

    B．

    C．

    D．

    (3)

    What can we learn from the text?

    [　　]

    A．

    A magnet-filled guiding way is formed inside a maglev train．

    B．

    Instead of electricity, magnets are used as the power of a maglev．

    C．

    Maglev trains can climb hills with the help of magnet wheels．

    D．

    Electric currents decide the movements of a maglev train．

    (4)

    What is the difference between a maglev train and an ordinary train?

    [　　]

    A．

    A maglev train can climb mountains without power while an ordinary one can't．

    B．

    A maglev train can travel in college campus while an ordinary train is not allowed．

    C．

    Travelling without a track, a maglev train is safer and smoother than an ordinary one．

    D．

    Floating on a track, a maglev train is faster, quieter than an ordinary, railway train．

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    One morning a few years ago，Harvard President Neil Rudenstine overslept. For this busy man，it was a sort of alarm: after years of non-stop hard work，he might wear himself out and die an early death.
    Only after a week's leave—during which he read novels, listened to music and walked with his wife on a beach—was Rudenstine able to return to work.
    In our modern life, we have lost the rhythm between action and rest. Surprisingly, within this world there is a universal but silly saying:“I am so busy.”
    We say this to one another as if our tireless efforts were a talent by nature and an ability to successfully deal with stress. The busier we are, the more important we seem to ourselves and, we imagine, to others. To be unavailable to our friends and family, and to be unable to find time to relax—this has become the model of a successful life.
    Because we do not rest, we lose our way. We miss the guide telling us where to go, the food providing us with strength, the quiet giving us wisdom.
    How have we allowed this to happen? I believe it is this: we have forgotten the Sabbath, the day of the week—for followers of some religions—for rest and praying. It is a day when we are not supposed to work, a time when we devote ourselves to enjoying and celebrating what is beautiful. It is a good time to bless our children and loved ones, give thanks, share meals，walk and sleep. It is a time for us to take a rest, to put our work aside, trusting that there are larger forces at work taking care of the world.
    Rest is a spiritual and biological need；however，in our strong ambition to be successful and care for our many responsibilities，we may feel terribly guilty when we take time to rest. The Sabbath gives us permission to stop work. In fact, “Remember the Sabbath ”is more than simply permission to rest；it is a rule to obey and a principle to follow.
    50. The “alarm” in the first paragraph refers to “______”.
    　　A. a signal of stress                                  B. a warning of danger
    　　C. a sign of age                                      D. a spread of disease
    51. According to Paragraph 4,a successful person is one who is believed to ____.
    　　A. be able to work without stress　　            B. be more talented than other people
    　　C. be more important than anyone else　　 D. be busy working without time to rest
    52. Some people feel guilty when taking time to rest because they ____.
    　　A. think that taking a rest means lacking ambitions
    　　B. fail to realize that rest is an essential part of life
    　　C. fail to realize that religions force them to rest
    　　D. think that taking a rest means being lazy
    53. What is the main idea of this passage?
    　　A. We should balance work with rest.
    　　B. The Sabbath givers us permission to rest.
    　　C. It is silly for anyone to say “I am so busy.”
    　　D. We should be available to our family and friends.

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    —I had a good holiday at my uncle’s.

    　　　　—________ .

    　　A. Oh, that’s very nice of you       B. Congratulations

    　　C. Oh, I’m glad to hear that         D. It’s a pleasure

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    She thought ________ a great honour to be invited to speak to us.

    [　　]

    A．that
    B．this
    C．it
    D．it is

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