用适当的介词或副词填空。 1. Though Zhang Guoli is a bit ill, he goes to work instead ______ staying at home. 2. The parents allowed their children to stay ______for their favorite program. 3. It is necessary to clean______ your desk every day. 4. —Mom, I think I'm well enough to go back to school. —Not really, my dear. You'd better stay ______ home for another day. 5. I think teenagers should be allowed to go______ with their friends on weekends.