There are many ways in which you can improve your study. But , you should work hard.
A. after all
B. above all
C. for all
D. in all
网友回答
A. after all
(答案→)B. above all
C. for all
D. in all
解析：
词组辨析:after all毕竟above all最重要的是 for all尽管，虽然in all总共，根据句意：有很多方式可以提高英语，但最重要的是,你应该努力学习。