—Jim, which _________do you like best?—I like geography best. 

— You look so healthy!— Yeah, I like eating apples. An apple a day keeps the _______ away.

He is a clever boy. His __________ are of great __________ to us.

To help the sick people in the hospital is _____ for me .

---- Do you know how to prevent the A/H1N1 flu?---- You can ask the doctor for some ________.