【題目】At that time, the calculator was a great ______ / n'venn /.

A.invent B.invitation

C.invention D.inventor

【答案】C

【解析】

試題分析:句意:那時,計算是一個偉大的發(fā)明。Invent動詞,發(fā)明;invitation邀請;invention名詞,發(fā)明;inventor發(fā)明家。根據(jù)音標(biāo)可知該選C。

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