问题
选择题
Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly. [ ]
A. is changing
B. has changed
C. will have changed
D. will change
答案
答案：A
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Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly. [ ]
A. is changing
B. has changed
C. will have changed
D. will change
答案：A