He is ——(good)at math than his brother

问题补充：

He is ——(good)at math than his brother

答案：

He is better—(good)at math than his brother

======以下答案可供参考======

供参考答案1:

应该是better吧

供参考答案2:

他比他哥哥（弟弟）擅长数学