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    This is difficult problem that few students can work it out. A. so B. so a C. such D. such a 【查看更多】

     

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     This is _______ difficult problem that few students can work it out.

    A. so                     B. so a                      C. such                     D. such a    

     

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    This is______difficult problem that few students can work it out.

    A.so B.so a C.such D.such a

     

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    This is ________ difficult problem that few students can work it out.    
    [     ]
    A. so                    
    B. so a    
    C. such                
    D. such a

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    This is ______difficult problem that few students can work it out.
    [     ]
    A. so  
    B. so a  
    C. such  
    D. such a

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    This is _______ difficult problem that few students can work it out.

    [     ]

    A. so
    B. so a
    C. such
    D. such a

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