While I was making the model plane，my little nephew kept asking me questions with great ______ .

—How often does your sister surf the internet?—About            .

—Have you been watching TV? Don’t        valuable time running.—I’m not. I’m tired now and only am taking a short break.

You don’t know ______ I want to see you again. It’s a year since I last saw you.

The expert says that nowadays there are too many problems linked to poor diet and a ________of exercise.