用括号内单词的适当形式填空
1. You may be _____ (worry) if you are in trouble and have no one to help you.
2. The doctor suggested she _____ (stay) in bed for a few days.
3. Allow yourselves plenty of time _____(get) to the airport.
4. The _____ (environment) damage caused by the chemical industry.
5. —Do you know where our head teacher lives?
—He lives on the ____(five) floor in that building.