She studied abroad in order to brush up her English.

He went to America last year to brush up his English.

I must brush up my English.

I would like to brush up my English.

You better brush up your English if you go to America.

He went to France to brush up on his speaking ability.

Ken wishes to brush up his English.

You have to polish your English.

"If I was just 10 cm taller, it wouldn't be any effort for me to polish these glass windows." "It's no good wishing for the moon. Here, I've brought you a chair."

Go brush your teeth now.