—Got your driving license? —No. I ________ too busy to have enough practice, so I didn't take the driving test last week.

The school rule states that no child shall be, unless        by an adult, allowed out of the school during the day.

After working for two years, Tim Martin was ___ as the top manager in charge of the company.

The world will be different from what it is now, and we will have to be prepared to ____to the change.

 As the road to the airport is under reconstruction, we'd better ________ early to avoid the traffic jam.