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【题目】The 4G mobile phone has a great effect on people’s life since it _______ .

A.inventsB.inventedC.is inventedD.was invented

【答案】D

【解析】

句意:自从4G手机发明以来,它极大地影响了人们的生活。

考查动词时态和动词被动语态。invents主动一般现在时态;invented主动过去时态;is invented一般现在时被动结构;was invented一般过去时态被动结构;根据句中的since自从……可知,后面要接过去时态的句子或过去的时间点。而句子主语与动作之间是被动关系,所以应该用被动语态,结构是“助动词be+及物动词的过去分词”,一般过去式的被动语态构成was/ weredone,故选D

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