―How can I improve my pronunciation,Madam?
―Keep on ______ and you'll all make progress.
practice
practicing
to practice
--- Some of the plastic bags can’t ______ after June1. --- Yes, people will use environmental bags instead.
--- All the clerks went home _____ Mr. Wang. Why? --- Because he had to finish his work.
--- Can you_____ your little brother? I’m busy now. --- OK. I’ll do it right now.
--- You always spend only a little time on your study. You really _____ me down. --- I’m sorry, Mum. I won’t do that again.
---There are many volunteers ______ are helping the children in Sichuan. --- And most of them are college students.