He was a much older tennis player, but he had a(n)_______over other players in experience.

The lack of eco-friendly habits among the public is thought to be a major _____of global climate change.

I can't say which wine is best-it's a (n) ___ of personal taste. 

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

Companies are struggling to find the right _____between supply and demand, but it is no easy work .