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Selecting a mobile phone for personal use is no easy task because technology ________ so rapidly.


  1. A.
    is changing
  2. B.
    has changed
  3. C.
    will have changed
  4. D.
    will change
A
解析:
题干中主句为Selecting a mobile phone …is no easy task,谓语动词表示了一种“含此刻在内的广泛意义上的现在时间”,使用的是一般现在时态(…is no easy task);后面的状态从句(because…)中则说明原因为“技术更新变化迅速”,应采用现在进行时:(technology)is changing(so rapidly).现在进行时态在此表示了一种“持续变化”的状态,体现了“变化、趋势、发展和进展”(Collins COBULLD ENGLISH GRAMMAR),类似用法又如:His handwriting is improving.World energy demand is increasing at a rate of about3% per year.
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