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    31． The World Expo is coming． My cousin in Shanghai as a volunteer in 2010． A． has been working B． has worked C． works D． is going to work 【查看更多】

     

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    The World Expo is coming．My cousin in Shanghai _______ as a volunteer in 2010．

    A． has been working                              B． has worked

    C． works                                             D． is going to work

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