Allthesegiftsmustbemailedimmediately

来源：语文精选馆 2.07W

All these gifts must be mailed immediately _______ in 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

解析：本题考查了不定式作目的状语的用法。so as to用于句中，且其后的动词和它的句子的主语存在被动关系，需采用不定式的被动形式。