Selecting a mobile phone for personal use is no easy task because technology so rapidly.
A. will change
B. has changed
C. will have changed
D. is changing
网友回答
A. will change
B. has changed
C. will have changed
(答案→)D. is changing
解析：此处技术的变化指在一段时间内一直进行的变化，故用现在进行时。句意：选一部个人用手机不是一件容易的事情，因为技术变化很快。