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    David can’t go to take part in the sports meeting, because he’ll take care of his mother who is ill. A. must B. has to C. have to D. needs to 【查看更多】

     

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    David can't go to take part in the sports meeting, because he'll ________ take care of his mother 
    who is ill.        
    [     ]
    A. must        
    B. has to       
    C. have to        
    D. needs to

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