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    It is essential that these application forms be sent back as early as possible．这些申请表应尽早地寄回.这是很重要的. 【查看更多】

     

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    It is essential that these application forms ______ back as early as possible.

    A．must be sent

    B．will be sent

    C．are sent

    D．be sent

     

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    It is essential that these application forms ______ back as early as possible.

    A．must be sentB．will be sentC．are sentD．be sent

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