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    There are several research centers in China a certain disease called Bird Flu is being studied. A. which B. where C. when D. what 【查看更多】

     

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    There are several research centers in China ________ a certain disease called Bird Flu is being studied.

    A. which       B. where    C. when     D. what

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    There are several research centers in China ________ a certain disease called Bird Flu is 
    being studied. 

    A．whichB．whereC．whenD．what

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    There are several research centers in China ________ a certain disease called Bird Flu is 

    being studied. 

    A．which            B．where            C．when             D．what

     

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    There are several research centers in China ________ a certain disease called Bird Flu is being studied.


    1. A.
      which
    2. B.
      where
    3. C.
      when
    4. D.
      what

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