He needs to work ________ hour ________ night.
Tom is only four years old, __________ he can draw beautiful pictures.
- Is your father in?- No, he ______ for three hours.
—Miss Gao has ____________ free time than Mr Green. —I think so. She is busy every day.
Tomorrow we’ll go to the city park if it ___________ rain.
Because of the ______ snow, the birds could not _______ anything to eat.