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

A. invents B. invented C. was invented

【答案】C

【解析】句意:手機自從發(fā)明以來,它已經(jīng)很大地影響了人們的生活。since引導的時間狀語從句用一般過去時,主句用現(xiàn)在完成時,結合句意,手機被發(fā)明,故用一般過去時的被動形式,故選C。

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