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    4．--It must be John who is in the office．--I'm sure it be John．I saw him off at the railway station just twenty minutes ago．A．won't B．mustn't C．can't D．needn't 【查看更多】

     

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    --It must be John who is in the office．

    --I'm sure it ________ be John．I saw him off at the railway station just twenty minutes ago．

    A．won't         B．mustn't           C．can't         D．needn't

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    －It must be John who is in the office．

    －I'm sure it ________ be John．I saw him off at the railway station just twenty minutes ago．

    [　　]

    A．won't

    B．mustn't

    C．can't

    D．needn't

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