单选题 Selecting a mobile phone for personal use is not an easy task because technology ______ so rapidly.
  • A.is changing
  • B.has changed
  • C.will have changed
  • D.will change
【正确答案】 A
【答案解析】[解析] because所在的句子是从句部分,故用现在时,因此C、D选项可以排除,A项表示此动作的进行,故选A。