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    4．( )It is because a certain virus has the operating system that the computer doesn’t work. A. broken up B. broken out C. broken down D. broken away 【查看更多】

     

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    It is because a certain virus has ________ the operating system that the computer doesn't work.


    1. A.
      broken up
    2. B.
      broken out
    3. C.
      broken down
    4. D.
      broken away

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