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    11、——Need the patient be operated on immediately?

    ——Unless         .

    A. being necessary                                   B. necessary

    C. she is necessary                                 D. there is necessary

    11、B

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    ——Need the patient be operated on immediately?

    ——Unless         .

    A. being necessary                                   B. necessary

    C. she is necessary                                 D. there is necessary

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