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    You buy a gift, but you can if you want to. A. must B. mustn't C. have to D. don't have to (D) 【查看更多】

     

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     You__________buy a gift, but you can if you want to.

         A. must            B. mustn't          C. have to          D. don't have to

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    You       buy a gift, but you can if you want to.

    A. must                        B. mustn't          C. have to          D. don't have to

     

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    You       buy a gift, but you can if you want to.

    A. must                        B. mustn't          C. have to          D. don't have to

     

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     You       buy a gift, but you can if you want to.

    A. must            B. mustn't          C. have to              D. don't have to

     

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    You  ___ buy a gift,  but you can if you  want to.    
    [     ]
    A. must                            
    B. mustn't  
    C. have to                        
    D. don't have to

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