improve

我每天读英语书来提高我的词汇量。

I read English books every day to ___improve my vocabulary.

我认为提高法语的最好方法是住在法国。

I thought the best way to ___improve my French was to live in France.

我认为提高你英语的最好方法是每天练习。

I think the best way to ___improve your English is to practice every day.