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    I don't know who invented telephone. It's really most useful invention. A. the;a B. /:a C. a; the D. /; the 【查看更多】

     

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    I don’t know who invented ________ telephone. It’s really ________ most useful invention.

    A. the; a                       B. /; a                   C. a; the                       D. /; the

     

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    I don’t know who invented ________ telephone. It’s really ________ most useful invention.


    1. A.
      the; a
    2. B.
      /; a
    3. C.
      a; the
    4. D.
      /; the

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    I don't know who invented _____ telephone. It's really _____ most useful invention.
    [     ]
    A. the; a
    B. /; a
    C. a; the
    D. /; the

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    I don’t know who invented ________ telephone. It’s really ________ most useful invention.

    A．the; aB．/; aC．a; theD．/; the

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    I don’t know who invented _______ telephone, it’s really _______ most useful invention.

    A．the; a

    B．the; the

    C．a; a

    D．不填；不填

     

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