◎ 题干

The professor’s research finally proved to be ______, though he had spent a lot of money on it.
A.pricelessB.valuableC.worthlessD.worthwhile
◎ 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“The professor’s research finally proved to be ______, though he had spent a lot of money on it.A.pricelessB.valuableC.worthlessD.worthwhile…”主要考查了你对  【形容词的比较级】【形容词的最高级】【形容词的排序】【形容词】  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。