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Directions: Choose the best answer to the question you hear, basing your answer on the short conversation you hear each time.
1. M: The Browns look so miserable these days.

    21. He_________the connection between the man-made electrical charge and the natural lightning.
      A） sought     B） sought in  C） sought finding  D） sought to find

    31. His manufacturing methods helped_________the foundations for the industrial strength of the North.
        A） laying    B） to lay C） lying     

    31.For some time he has demanded that the government_________blacks as citizens.
      A） has regarded        B） have regarded
 

    1.The last time we had a family reunion was_________my brother's wedding ceremony four years ago.
      A） in      B） at      C） during   D） ov

    56. Nowhere in nature is aluminum found free， owing to its always_________with other lements， most commonly with oxygen.
        A） combined        B） having combined

    11.All the students in this class passed the English exam________the exception of Li Ming.
      A） on      B） in      C） for     D） with

    21.Our house is about a mile from the station and there are not many houses 　　　　.
　　　A）in between        B）among them  
　　　C）far apart     

    66. Astronauts can be affected by loneliness. They may have to sit in the spacecraft for weeks　　　　.
        A） for no one to talk to    B） for there is no one to talk
 

    1. Frankfurt， Germany， is in one of the most_________populated regions of Western Europe.
      A） densely B） vastly   C） enormously  D） largely
 

    41.The judge sentenced Rod　　　　 two years in prison.
      A） in      B）to      C）into     D）for

    61.The boy was committed 　　　　the care of his uncle .
      A） in      B） for     C） to    D） with

    81. I appreciated　　　　the opportunity to study abroad two years ago.
        A） having been given    B） having giving
   

    21. She was so_________in her job that she didn't hear anybody knocking at the door.
        A） attracted B） absorbed   C） drawn   D） concentrated (B4，1996.1- 25)

    71.The patient is _________medical treatment.
      A） for      B） under    C） in      D） on