题目内容

18．New technology____________to stop the students from cheating in the exam last year．（　　）
A．is usedB．usedC．was used

分析 去年在考试中运用了新技术阻止学生们作弊．

解答 答案：C
根据last year可知，这是表示过去的时间状语，所以运用一般过去时态；又因为主语New technology是动词use的承受者，应该用被动语态．一般过去时态的被动语态的构成是：was/were+动词的过去分词，主语是单数，所以用助动词用was，故选C．

点评 判断动词的时态，要通过所给的时间状语或语境去判断动词存在的状态；判断动词的语态，要看看主语是谓语动词的执行者还是承受者．

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