---A number of volunteers ____ willing to work in poor areas in the western part of China.---Yes, the number is getting ________.
There are enough cups for each visitor to have _______.
– I’m going to Mary’s birthday party. Bye, mom. --_______, David!
Look! There are some birds _______ in the sky. They are very beautiful.
You’d better _______ the test paper before handing it in.
Nancy, sweep the classroom, _______?