Although chatting on line has exploded in popularity in recent years there is no for a f

问题补充：

Although chatting on line has exploded in popularity in recent years, there is no for a face-to-face conversation.

A. privilege

B. affection

C. substitute

D. adjustment

答案：

A. privilege

B. affection

(答案→)C. substitute

D. adjustment

解析：名词辨析。A特权；B喜爱；热爱；C代替者；D调整；句意：尽管上网聊天在这几年里很受欢迎，但是也没有代替面对面的交流。根据句意说明C正确。