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    Stamps are usually used letters. A. to sending B. to send C. for send D. for sent 【查看更多】

     

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    Stamps are usually used _____letters.

    A．to sending

    B．to send

    C．for send

    D．for sent

     

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    Stamps are usually used ________ letters．

    [　　]

    A．to sending

    B．to send

    C．for send

    D．for sent

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