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试题详情及答案解析
__________ he studied hard, he still failed the test.
A.UnlessB.ThoughC.IfD.because.
答案:B
试题分析:句意:虽然他学习很努力,但是他考试还是失败了。Unless除非;Though虽然;If如果; because因为。所以选B。
考点:考查连词。