―How can I improve my pronunciation,Madam?
―Keep on ______ and you'll all make progress.
practice
practicing
to practice
My pen pal from America is coming to visit me. I’m thinking about ______.
I wonder ______ you would like to go hiking with us this weekend.
Could you tell me ?
— Kitty, do you know ______? — Sure, about forty minutes.
People in Yancheng are proud of ________ they have achieved in the past thirty years.