The professor’s research finally proved to be ______, though he had spent a lot of money on it.A.pri

题目简介

The professor’s research finally proved to be ______, though he had spent a lot of money on it.A.pri

题目详情


The professor’s research finally proved to be ______, though he had spent a lot of money on it.
A.pricelessB.valuableC.worthlessD.worthwhile
题型:单选题难度:偏易来源:不详

答案

C

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