He is from an ________ country.

What I want to     to teenagers is that being addicted to the Internet will to some extent do harm to both mental and physical health．

Mary is going on a diet .  as she has put on _______recently.

After studying in medical college for five years, Jane ______ her job as a doctor in the countryside.

 It can be easy to _______ such bad habits as smoking and heavy drinking, but it is not so easy to quit.