Our teacher told us that we must be strict ourselvesour study.

_______is great fun. It can make us happy.

He made a mistake, but then he took action to change the situation ________ it got worse.

Could you come to my party tomorrow evening—Sorry, I have something important to do.—That’s too bad. Maybe ______time.

On weekends the Smiths usually drive to the countryside and ________ the fresh air there.