The elephants are ________ great danger in Africa.
---Do you mind taking the guitar to the office for me? ---________. Put it in my car, please.
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?