---Do I need to ______ for the party? ---Don’t bother. It’s only an informal party. Come as you are.
When I went in , they were ____ in a heated discussion .
The ________ for tonight’s talk is protecting the environmet.
You can't camp________you like these days. Many natural areas are now under protection.
The samples__________in quality but were general acceptable.
Cleaning women in big cities get _____ by the hour.