I’m moving to the countryside because the air there is much fresher than _______ in the city. 

It is not the strongest of the species that survives, nor the most intelligent that survives. It is     ______ that is most adaptable to change.

._____ is the weather like today?

I remember that _____ took part in the ball party had a wonderful time.

Generally speaking, clothing made of man-made fibers is less superior than _______ made of natural fibers like cotton, wool or silk.