The students union was founded for the______ of them.

She wasn’t a much older tennis player but he had the great ______ of experience about games.

Teachers have to constantly update their knowledge in order to maintain their professional ______. 

Sometimes, the _____ of humor in this country causes misunderstanding in other countries.

Having lost all their _____ in a big fire, the Blacks had to depend on their friends and relatives for a living.