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【题目】At that time, the calculator was a great ______ / nvenn /.

A. invent B. invitation

C. invention D. inventor

【答案】C

【解析】

试题分析:句意:在那时,计算机是一个伟大的发明。invent 是一个动词,意思是发明;invitation 是一个名词,意思是邀请;invention是一个名词,意思是发明;inventor发明者。根据句意和音标可知,这里是说计算机是一个伟大的发明,应该用名词。故选C。

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