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    I don’t know . A. what to do it B. how to do it C. what to do D. to do what 【查看更多】

     

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    I don’t know             .
    A what to do it   B how to do it C how to do  D what should I do

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    I don’t know             .

    A what to do it   B how to do it C how to do  D what should I do

     

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    I don’t know             .
    A what to do it   B how to do it C how to do  D what should I do

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    I don't know _______.
    [     ]
    A. what to do it
    B. how to do it
    C. how to do
    D. to do what

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     I don’t know _________.

        A. what to do it  B. how to do it   C. what to do   D. to do what

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