They usually spend two hours _______ their homework every day.A. do B doing C to do
If prices rise too high, the government has to do something _________ it.
Don’t forget to wash your hands _________ you have meals.
Look! Jack and his monkey _________ flying disk together in the garden.
Peter likes music _________is very loud and energetic.
If you sit in a chair _____a long time, your back may begin to hurt.