It is unhealthy _______ us to eat too much sweet food and it is wrong _______ us to buy sweet food every day.
Do you go to school _____ Saturday morning?
This piece of music is _______popular than that old one.
________important for everyone to have a healthy lifestyle.
We have no time to play. We have _________ homework to do.
--_______may I keep this book? --For two weeks.