Question

【题目】The mobile phone has influenced people’s life a lot since it ________________.

A. invents B. invented C. was invented

Answer 1

【答案】C

【解析】句意：手机自从发明以来，它已经很大地影响了人们的生活。since引导的时间状语从句用一般过去时，主句用现在完成时，结合句意，手机被发明，故用一般过去时的被动形式，故选C。