If you want ________ your pronunciation, keep on practicing every day.
improve
improved
improving
to improve
What will the weather ______ the day after tomorrow?
---Can your uncle play basketball?---Yes, he can play ______ basketball ______ football. He is good at sports.
---______ a small plane in the future? ---Yes, I think so.
Tony gets up very late in the morning, ______ he is often late for school.
No one can exactly tell us what .