Selecting a mobile phone for personal use is no easy task because technology so rapidly.A. is changing B. has changedC. will have changed D. will change 题目和参考答案——青夏教育精英家教网—

题目内容

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

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