Jack is doing better in math.Jack is ()()math改同义句
问题描述：
Jack is doing better in math.Jack is ()()math改同义句
答
很高兴能回答您的问题!
应该为：Jack is (better) (at) math.
do better in sth =be better at sth【be better at是be good at的比较级】
以上就是我的参考答案,希望能对您有一定的帮助,