This year my brother made a little progress in his study, but , it’s been an unlucky year

This year my brother made a little progress in his study, but , it’s been an unlucky year for him.
A. first of all
B. all in all
C. in all
D. as a consequence

A. first of all(答案→)B. all in allC. in allD. as a consequence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。

我明天再问问老师，叫他解释下这个问题