问题
选择题
The mobile phone has influenced people’s life a lot since it _______.
A．invents
B．invented
C．is invented
D．was invented
答案
答案：D
题目分析：句意：自从手机被发明以来，他已经太多地影响了人们的生活。Since引导的从句主句用完成时从句用一般过去式，根据题意可知用被动语态，根据句意故选D