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

A. invents B. invented C. is invented D. was invented

【答案】D

【解析】试题分析:句意:自从3G手机被发明,他们已经对人们的生活有了很大的影响。since自从……,后加过去时态的句子或过去的时间点。被动语态表示主语是动作的承受者,即行为动作的对象。被动语态由助动词be+及物动词的过去分词构成。一般过去式的被动语态构成wasweretdone,根据语境故选D

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