We see the zooo keepers give t___food to eat.They don't h___to find food for themselves.

We see the zooo keepers give t___food to eat.They don't h___to find food for themselves.
But most of them are sad.Why?They are not free!Animals l___elephants,monkeys and tigers usually live freely and happily in forests or mountains.Tigers,for example ,run,jump and play w___