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    ( ) -Who is singing in the next room? - must be Mary. A. She B. This C. It D. He 【查看更多】

     

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    —Who is singing in the next room?        
    —______ must be Mary.      
    [     ]
    A. She    
    B. This    
    C. It    
    D. He

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    －Who is singing in the next room?

    －________ must be Mary．

    [　　]

    A．She

    B．This

    C．It

    D．He

    查看答案和解析>>

    －Who is singing in the next room?

    －________ must be Mary．

    [　　]

    A．She

    B．This

    C．It

    D．He

    查看答案和解析>>


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