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

答案及解析： C

解析：

解析：所有的礼物应立即被寄出去，当然是为了使它们及时被收到．“in order to”和“so as to”都表目的，但“receive”和“gift”之间应是被动关系，所以so as to be received对．命题立意：表目的时so as to不能放在句首，in order to可以，这一点也应记住．同时还应记住 in order，so that引导的状语从句的用法．