Technology is developing so rapidly that _____ for only a year, my cellphone is out-of-date. [ ]A. u

题目简介

Technology is developing so rapidly that _____ for only a year, my cellphone is out-of-date. [ ]A. u

题目详情

Technology is developing so rapidly that _____ for only a year, my cellphone is out-of-date.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

答案

B

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