Selecting a mobile phone for personal use is not easy task because technology_____so rapidly.（2002 春 上海）A.is changing \x05\x05\x05B.has changed C.will have changed \x05\x05D.will change

Selecting a mobile phone for personal use is not easy task because technology_____so rapidly.（2002 春 上海）A.is changing \x05\x05\x05B.has changed C.will have changed \x05\x05D.will change
Selecting a mobile phone for personal use is not easy task because technology_____so rapidly.（2002 春 上海）
A.is changing \x05\x05\x05B.has changed
C.will have changed \x05\x05D.will change

Selecting a mobile phone for personal use is not easy task because technology_____so rapidly.（2002 春 上海）A.is changing \x05\x05\x05B.has changed C.will have changed \x05\x05D.will change
A.is changing.
has changed 规在完成式表示变革这个动作已经完成,但事实上科技还在不断变革中,所要要选一个进行时态：is changing.

A. is changing 因为技术在不断变化 ，所以挑选手机不是一件容易事