—Look! There’s still so much food left.--Why not _________ it? We can have it for dinner.
Xi’an is a city with many places of interest and __ tourists come here every year.
—_____ you _____ your homework yet? —Yes, I _____ it ten minutes ago.
It’s necessary for you _____ exercise every day.
—I _______ here since I was five years old.
The Greens _____ China for seven years.