Technology is developing so rapidly thatfor only a year , my cellphone is out-of-date .A．using B．hav

题目简介

Technology is developing so rapidly that for only a year , my cellphone is out-of-date .

A．using

B．having been used

C．having used

D．is using

题型：单选题难度：中档来源：不详

考察非谓语动词，根据句子结构可知，该处为状语，排除D。use和他的逻辑主语my cellphone之间是被动关系，排除AC，所以选择B
意为，技术发展的如此迅速，以致于，尽管仅仅被使用了一年，我的手机已经过时了。