One is not born a ____; one becomes a _____.

-- You are always full of _______. Can you tell me the secret?-- Taking plenty of exercise every day.

In part of China, some people still have difficulty gaining       to social services.

 --What kind of ________ makes 3G cellphones so popular with the young? --Video communication, I think.

In order to attract more customers,many supermarkets usually sell their goods at a good     at weekends.