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    by his teachers, he felt nervous. A. Having watched B. Having been watching C. Watching D. Being watched 【查看更多】

     

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    ____ by his teachers, he felt nervous.

      A. Having watched      B. Having been watching   C. Watching   D. Being watched

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    ____ by his teachers, he felt nervous.  
    [     ]    
    A. Having watched      
    B. Having been watching  
    C. Watching  
    D. Being watched

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    _________ by his teachers, he felt nervous.

    [　　]

    A．Having watched
    B．Having been watching
    C．Watching
    D．Being watched

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