◎ 题干
—Is your uncle an ________?
—Yes, he recently invented ________ useful machine.
A. invent, the
B. inventor, an
C. inventor, a
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ —Is your uncle an ________?—Yes, he recently invented ________ useful machine.A. invent, theB. inventor, anC. inventor, a…”主要考查了你对  【专有名词】【名词所有格】【集合名词】【名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。