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    - have you been learning to swim? -Half a year. A. When B. How long C. How often D. How soon 【查看更多】

     

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    ----______have you been learning to swim ?  ----Half a year.

    A. How long  B. How often C. How far  D. When

     

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    — _______have you been learning to swim?  
    —Half a year.  
    [     ]
    A. How long                  
    B. How often  
    C. When                      
    D. How far

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    －________have you been learning to swim?－Half a year．

    [　　]

    A．How long

    B．How often

    C．How far

    D．When

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