Advertising is different from other forms of munication in that the advertiser pays for the message .
A. to deliver
B. delivered
C. to be delivered
D. delivering
网友回答
A. to deliver
B. delivered
(答案→)C. to be delivered
D. delivering
解析：广告不同于其他的交流形式因为广告商要为即将传递的信息付费。the message与 deliver为被动关系从时间关系上看是没到的时间所以要用不定式的被动式，而delivered虽为被动但是表示的是做过的动作不符合句意所以答案为C。