---Do you know the man is reading the book over there? ---Yes, he’s Mr. Green, our PE teacher.
Those singers have lovely ___________ and they sing very well.
---How often ___________ the Olympics _____________? ---Every four years.
There were two small rooms in the house, ____ smaller of which served as ____ kitchen.
Is there _______________ to sleep for half a day?
I think you can help ____________ a donation or doing some voluntary work.