Over the long process of evolution, animals have developed their ______ senses, which makes it possible for them to _____ their environments.
-- Who broke the glass? - I suppose _____ must be one of the children.
She cut the cloth with _____ scissors.
It is reported that _________ schools are improving their IT environment.
He became famous ______.
Next door to ours _____, who has just retired from work.