He has a keen sense of duty and responsibility.
The raw generation is very keen to get education.
A student who takes a keen interest in his studies, rises to some good position in life.
He is a keen cricket enthusiast.
I am very keen to do a film with him.
People who miss-spell words are usually those who are not keen observers.
She is keen to work with me.
He is keen on winning the championship.
He always possessed a keen desire to be adventurous.
He takes a very keen interest in his work.