Living in the city will surely put you in touch with people from ______ cultures．

A good diet and some moderate exercise are ____ to good health. 

 — Dad, would you please buy some strawberries for me? I love them. — I’d like to, but they are not _____ in winter.

 It was _______ to see so many ________ people in a small town.

Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.