This year my brother made a little progress in his study, but _____, it’s been an unlucky year for him.A.first of allB.all in allC.in allD.as a consequence
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B解析本题考查介词短语辨析。句意为：今年我弟弟在他的研究中取得些进步,但总的来说,这是对他来说是不幸的一年。all in all总之；first of all首先；in all总共；as a consequence因此。