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    【题目】All these gifts must be mailed immediately __________ on time for Christmas.

    A. in order to have received

    B. in order to receive

    C. so as to be received

    D. so as to be receiving

    【答案】 C

    【解析】考查目的状语。句意：所有这些礼物必须立即被寄走，以便在圣诞节按时被收到。

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