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    23． -Wow, you have a really good voice． I you were good at singing． -Thank you． A． haven’t known B． don’t know C． didn’t know D． hadn’t known 【查看更多】

     

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    —Wow, you have a really good voice．I          you were good at singing．

    —Thank you．

    A．haven’t known        B．don’t know       C．didn’t know       D．hadn’t known

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