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

     

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     I really don’t know _________.

    A. what should I do   B. what to do  C. what does  D. what doing

        

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    I really don't know _________.

    A. what should I do　　　　　　　　　　　　　　　　　　B. what to do

    C. what does　　　　　　　　　　　　　　　　　　　　　　 D. what doing

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    I really don’t know_________.

    A. when to do                    B. how to do               C. what to do            D. where to do

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     I really don’t know____________.

    A．how to do

    B．what to do

    C．what should I do

    D．how I should do

     

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    I really don’t know _____ to do .     

    A. what   B. where   C. how

     

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