—What can we do to prevent (避免)being ill?—We should do more exercise and eat a ________ diet to take good care of ______.

_______ work late. They’re very busy when people go out to dinner.

— I hear you have to run for half an hour every day.— Right. It is one of the            in my school.

This summer vocation I am going to do a lot of _________ to prepare for the senior high school.

 When we stayed at the country house, we had only enough water for drinking. That’s why we didn’t take a            for two days.