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    03．I don’t know how commas. 【查看更多】

     

    题目列表(包括答案和解析)

    I don’t know how ________ commas.
    A．useB．usingC．usedD．to use

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    I don't know how_______commas.    
    [     ]
    A. use    
    B.  to use    
    C.  used    
    D.  using

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    I don't know how _____ commas.
    [     ]
    A. use
    B. to use
    C. using
    D. used

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    I don't know how I can use commas. (改为同义句)

    I don't know ________ ________ use commas.

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    I don't know how I can use commas. (改为同义句)

    I don't know ________ ________ use commas.

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