题目内容
The professor’s research finally proved to be ______, though he had spent a lot of money on it.
A.priceless | B.valuable | C.worthless | D.worthwhile |
C
解析
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题目内容
The professor’s research finally proved to be ______, though he had spent a lot of money on it.
A.priceless | B.valuable | C.worthless | D.worthwhile |
C
解析