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    ------Bob didn’t pass this exam. ------He A. should study hard B. should have studied hard C. should be studying hard D. study hard 【查看更多】

     

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    — Bob didn't pass this exam. 
    — He _____.

    [     ]

    A. should study hard
    B. should have studied hard
    C. should be studying hard
    D. study hard

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    — Bob didn't pass this exam. 
    — He _____.

    [     ]

    A. should study hard
    B. should have studied hard
    C. should be studying hard
    D. study hard

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    — Bob didn’t pass this exam.

    — He____________.

          A. should study hard        B. should have studied hard

     C. should be studying hard      D. study hard

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    — Bob didn’t pass this exam.

    　 — He____________.

    　 A. should study hard B. should have studied hard C. should be studying hard D. study hard

     

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